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Old 01-09-2003, 06:15 PM   #1
munkis
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Member#: 1847
Join Date: Jul 2000
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Default The Subaru CEL thread

Purpose: Did your Scooby throw a cel?

Help us to see what is common with subarus, every car line has problems accross the line, with the thread we can see what kind of problems subaru is experiencing, what are the most common causes of the CEL to come on on a scoobie.

So please post, your cars, year, make, model and mileage, what cel code you have gotton, the code and definition.

If it was fixed, please include what was done to rectify the the problem.

Things not to post.
If you have a high flow cat and keep getting cat efficiency codes.

this is a reference thread meant to help those who have from stock to slightly moddified vehicles.

lets see how it goes.

Thanks everyone.

Please try to use this format for posting to the log, then add your comments below the entry.

Code: Defintion
Year/Make/Model
Mileage:
Fix for problem:

Last edited by munkis; 01-14-2003 at 09:31 PM.
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Old 01-10-2003, 10:47 AM   #2
GreenGiant
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Join Date: Jun 2002
Location: Raleigh, NC
Vehicle:
2000 Outback Ltd Wgn
Timberline Green

Default P0420 Cat below efficiency

P0420 - Cat. below efficiency threshold: Bank 1.
2000 Legacy OBW LTD.
61k

I have a 2000 Legacy OBW Ltd. with 61K on the clock. My car is BONE STOCK as far as the engine is concerned. I got a P0420 "Cat. below efficiency threshold: bank 1". I was told by the AutoZone clerk that this is an O2 sensor going bad and I needed to replace the sensor. I have since been told by McDade and HndaTch627 that this is really my cat going bad. Updates to come.

Tony

*Update* OK I have to fess up to being dumb. I had replaced the spark plugs before I got the code and I had used Bosch Platinum regular plugs, not the "plus 2 or 4" gimicks just regular platinum plugs. I know that I had been warned about using Bosch plugs but they were the only things available at the time. I ended up calling the stealer (Southern States) and talking to Quincy the lead Suby mechanic. I told him that I had done the 60K service and he said "You put Bosch Platinum plugs in it didn't you.". I told him I had and he told me to get them out and replace them with NGKs. I was able to find regular copper NGK "V-power" plugs that crossed to the original Champion plugs. Once I put the plugs in and drove it a couple of days the light went out but I still had it cleared by AutoZone. I have been driving it now for about a week in the fixed state with no light and much better fuel economy.

/kicks self in butt/

Last edited by GreenGiant; 02-05-2003 at 08:40 AM.
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Old 01-12-2003, 10:58 PM   #3
Matt
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Exclamation Re: P0420 Cat below efficiency

Quote:
Originally posted by GreenGiant
I have a 2000 Legacy OBW Ltd. with 61K on the clock. My car is BONE STOCK as far as the engine is concerned. I got a P0420 "Cat. below efficiency threshold: bank 1". I was told by the AutoZone clerk that this is an O2 sensor going bad and I needed to replace the sensor. I have since been told by McDade and HndaTch627 that this is really my cat going bad. Updates to come.

Tony
P0420 - Cat. below efficiancey threshold: bank 1
I've had that twice. I had 49k on the clock. The dealer replaced the cat. 10k miles later, I've not seen that CE light.

Now I'm getting another code, P0065. I've had 6 CE lights since Thanksgiving.

A friend had the same code on his RS a few weeks ago. Turns out that a solenoid mounted on a bracket behind the power steering resivoir. I took it apart and cleaned it, seemed to work and the light was off, but as mentioned before, its back on. I also installed a Ganzflow intake at the same time and after 120 miles, I've got yet another CE light. I'll get it scanned tomorrow and post what it is.

BTW, the Ganzflow and K&N are my only modifications to the intake/fuel system.

Last edited by munkis; 01-14-2003 at 09:27 PM.
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Old 01-13-2003, 07:14 PM   #4
Mike Wevrick
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Default

Hmmm ... I swear I've seen (and entered info into) a similar thread already ...
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Old 01-13-2003, 10:59 PM   #5
jeddy
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Default

I recently had a P0420 (cat efficiency low, bank 1) on my 00 RS. I have a Stromung 2.25" cat-back, Borla headers, and 47K miles. The mechanic i went to (Honda and Subaru specialist) says he sees these types of codes alot in cars with high-flow exhausts and headers. A lack of heat shielding on the headers can supposedly also cause this, since the exhaust loses too much heat before getting to the cat.

I was told this will cause no harm, but the cats may not be working as well as they could.
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Old 01-14-2003, 03:37 AM   #6
Andrew Bacon
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00RS
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Default

Quote:
Originally posted by jeddy
I recently had a P0420 (cat efficiency low, bank 1) on my 00 RS. I have a Stromung 2.25" cat-back, Borla headers, and 47K miles. The mechanic i went to (Honda and Subaru specialist) says he sees these types of codes alot in cars with high-flow exhausts and headers. A lack of heat shielding on the headers can supposedly also cause this, since the exhaust loses too much heat before getting to the cat.

I was told this will cause no harm, but the cats may not be working as well as they could.
This is a catch 22: I have a Borla/ Apexi N1, 48K miles. I have been throwing CEL's a lot lately. (don't know the code yet) I took off the header yesterday to put in STi motor mounts and ThermoTec Header wrap. The inside of the header has heavy carbon fouling. So...somehow the O2 sensor is seeing an erroneous lean condition and is over richening the mixture, which is fouling the plugs, O2 sensor, Cat.....everything.

My other thought is maybe the Borla has a high enough flow that it blows the gasses through the cat too fast to burn fully?

I'm sure the header wrap will help, but I wish I knew which wire on the O2 sensor was the sense lead so I can test it at closed loop.
Are the 00' RS O2 sensors 0-5 volt? Is STOICH 2.5 volts?
Any help is greatly appreciated!
-Andy
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Old 01-14-2003, 06:38 PM   #7
Matt
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Default

Have either of you ever received a recall notice from Subaru for your o2 sensors or reprogram of the ECM? I had that code several times and once the dealer replaced the cat, it went away. I had the standard mid-pipe but Stromung rear box. I've also heard that that setup will throw that code frequently, but its meaningless after a while.

Oh, my pe0065 is currently off. I took apart the solenoid behind the power steering resivoir and cleaned it. Seems ok now, but I'll give it a few hundred miles before I declare it fixed.
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Old 08-24-2006, 11:04 AM   #8
SUBASCOTT
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Default

Quote:
Originally Posted by Matt
Have either of you ever received a recall notice from Subaru for your o2 sensors or reprogram of the ECM? I had that code several times and once the dealer replaced the cat, it went away. I had the standard mid-pipe but Stromung rear box. I've also heard that that setup will throw that code frequently, but its meaningless after a while.

Oh, my pe0065 is currently off. I took apart the solenoid behind the power steering resivoir and cleaned it. Seems ok now, but I'll give it a few hundred miles before I declare it fixed.
There is a reflash for the 0065 code ( air assist injector valve) the reflash adjusts the parameters the valve operates in.
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Old 01-14-2003, 08:19 PM   #9
Jon [in CT]
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02 WRX Sedan
Silver

Default Re: The Subaru CEL thread

Quote:
Originally posted by McDade
Purpose: Did your Scooby throw a cel?

Help us to see what is common with subarus, every car line has problems accross the line, with the thread we can see what kind of problems subaru is experiencing, what are the most common causes of the CEL to come on on a scoobie.

So please post, your cars, year, make, model and mileage, what cel code you have gotton, the code and definition.

If it was fixed, please include what was done to rectify the the problem.

Things not to post.
If you have a high flow cat and keep getting cat efficiency codes.

this is a reference thread meant to help those who have from stock to slightly moddified vehicles.

lets see how it goes.

Thanks everyone.

Gee, I thought there was already a "reference thread" for CELs in the Warranty Issues & SOA Problems forum titled WRX Check Engine Light Log, started on April 5, 2001 by a moderator with, currently, 296 posts.

Great idea to Balkanize the information.

Last edited by munkis; 12-16-2008 at 01:25 PM.
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Old 01-14-2003, 09:13 PM   #10
munkis
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Default

Not everyone on this board has a WRX , so spare me, further more that thread/log was started to use as ammo with SOA to get on the ball with all the CE light problems everyone was having with the 'new' wrx.

Also this thread has NOTHING to do with warranty or SOA, its is exactly as stated a log to so members can quickly find information on codes that they may have.

if I can find another full subaru line based cel log thread in this forum I will merge them.

please stick to the subject.

Ive edited some posts to be able to pick out the codes easier, please try to use this format

Code: Defintion
Year/Make/Model
Mileage:
Fix for problem:

thanks

Jay

Last edited by munkis; 01-14-2003 at 09:30 PM.
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Old 01-14-2003, 10:30 PM   #11
Jon [in CT]
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Default

Quote:
Originally posted by
if I can find another full subaru line based cel log thread in this forum I will merge them.

please stick to the subject
I argue that the WRX DOES represent the Impreza line. Subaru reports Impreza sales as an amalgam of RS, TS, Outback Sport and WRX sales. Last year Subaru reported that it sold a total of 38,226 Imprezas, of which 22,910 were WRXes (see http://www.prnewswire.com/cgi-bin/st...1869518&EDATE=). In other words, 60 percent of all Imprezas sold last year were WRXes.

However, Keep your thread for the small proportion of non-WRX Imprezas. Merely insure that the WRX CELS are reported in the long-running thread that was established for this purpose and has helped members in the past: WRX Check Engine Light Log.

Last edited by munkis; 12-16-2008 at 01:26 PM.
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Old 01-15-2003, 04:53 AM   #12
Andrew Bacon
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00RS
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Default

Quote:
Originally posted by Jon [in CT]
......Last year Subaru reported that it sold a total of 38,226 Imprezas, of which 22,910 were WRXes.....the small proportion of non-WRX Imprezas.....
Small proportion?!? 22,910 WRX's were added to our roads PREVIOUSLY occupied by Imprezas since the early 90's. There are a whole lot more non-WRX Imprezas on the roads than WRX's, and for that matter, this club was founded when there were ZERO USDM WRX cars on the road. When it comes to Imprezas, the WRX is the exception, NOT the norm, pal.

edit: I apologize for the OT posting I have shared in, but this guys false sense of exclusivity, sour attitude, and misinformation is a joke.

Last edited by Andrew Bacon; 01-15-2003 at 05:07 AM.
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Old 01-15-2003, 03:10 PM   #13
Pocon
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Silverthorn Metallic

Default

Found this, could be for future reference. _
Sorry about the length but there are a lot of codes for a WRX.

Subaru Specific OBDII Diagnostic Trouble Codes (DTC)

--------------------------------------------------------------------------------

P0031 Front oxygen (A/F) sensor heater circuit low input
P0032 Front oxygen (A/F) sensor heater circuit high input _
P0037 Rear oxygen sensor heater circuit malfunction
P0038 Rear oxygen sensor heater circuit high input
P0065 Air assist injector solenoid valve malfunction
P0066 Air assist injector solenoid valve circuit low input
P0067 Air assist injector solenoid valve circuit high input
P0101 Mass air flow sensor circuit range/performance problem (high input)
P0102 Mass air flow sensor circuit low input
P0103 Mass air flow sensor circuit high input
P0106 Pressure sensor circuit range/performance problem (low input)
P0107 Pressure sensor circuit low input
P0108 Pressure sensor circuit high input
P0111 Intake air temperature sensor circuit range/performance problem
P0112 Intake air temperature sensor circuit low input
P0113 Intake air temperature sensor circuit high input
P0117 Engine coolant temperature sensor circuit low input
P0118 Engine coolant temperature sensor circuit high input
P0121 Throttle position sensor circuit range/performance problem (high input)
P0122 Throttle position sensor circuit low input
P0123 Throttle position sensor circuit high input
P0125 Insufficient coolant temperature for closed loop fuel control
P0128 Thermostat malfunction
P0130 Front oxygen (A/F) sensor circuit range/performance problem (lean)
P0131 Front oxygen (A/F) sensor circuit range/performance problem (low input)
P0132 Front oxygen (A/F) sensor circuit range/performance problem (high input)
P0133 Front oxygen (A/F) sensor circuit slow response
P0136 Rear oxygen sensor circuit malfunction
P0139 Rear oxygen sensor circuit slow response
P0171 Fuel trim malfunction (A/F too lean)
P0172 Fuel trim malfunction (A/F too rich)
P0181 Fuel temperature sensor A circuit range/performance problem
P0182 Fuel temperature sensor A circuit low input
P0183 Fuel temperature sensor A circuit high input
P0244 Wastegate control solenoid valve malfunction (high input)
P0245 Wastegate control solenoid valve circuit low input
P0246 Wastegate control solenoid valve circuit high input
P0301 Cylinder 1 misfire detected
P0302 Cylinder 2 misfire detected
P0303 Cylinder 3 misfire detected
P0304 Cylinder 4 misfire detected
P0327 Knock sensor circuit low input
P0328 Knock sensor circuit high input
P0335 Crankshaft position sensor circuit malfunction
P0336 Crankshaft position sensor circuit range/performance problem
P0340 Camshaft position sensor circuit malfunction
P0341 Camshaft position sensor circuit range/performance problem
P0420 Catalyst system efficiency below threshold
P0442 Evaporative emission control system malfunction
P0444 Evaporative emission control system purge control valve circuit low input
P0445 Evaporative emission control system purge control valve circuit high input
P0447 Evaporative emission control system vent control low input
P0448 Evaporative emission control system vent control high input
P0451 Evaporative emission control system pressure sensor range/performance problem
P0452 Evaporative emission control system pressure sensor low input
P0453 Evaporative emission control system pressure sensor high input
P0456 Evaporative emission control system malfunction
P0457 Evaporative emission control system leak detected (fuel cap loose/off)
P0461 Fuel level sensor circuit range/performance problem
P0462 Fuel level sensor circuit low input
P0463 Fuel level sensor circuit high input
P0464 Fuel level sensor intermittent input
P0480 Cooling fan relay 1 circuit low input
P0483 Cooling fan function problem
P0500 Vehicle speed sensor malfunction
P0506 Idle control system RPM lower than expected
P0507 Idle control system RPM higher than expected
P0508 Idle control system circuit low input
P0509 Idle control system circuit high input
P0512 Starter switch circuit high input
P0545 Exhaust gas temperature sensor circuit low input
P0546 Exhaust gas temperature sensor circuit high input
P0604 Internal control module memory check sum error
P0703 Brake switch input malfunction
P0705 Transmission range sensor circuit malfunction
P0710 Transmission fluid temperature sensor circuit malfunction
P0715 Torque converter turbine speed sensor circuit malfunction
P0720 Output speed sensor (vehicle speed sensor 2) circuit malfunction
P0725 Engine speed input circuit malfunction
P0731 Gear 1 incorrect ratio
P0732 Gear 2 incorrect ratio
P0733 Gear 3 incorrect ratio
P0734 Gear 4 incorrect ratio
P0741 Torque converter clutch system malfunction
P0743 Torque converter clutch system (Lock-up duty solenoid) electrical
P0748 Pressure control solenoid (Line pressure duty solenoid) electrical
P0753 Shift solenoid A (Shift solenoid 1) electrical
P0758 Shift solenoid B (Shift solenoid 2) electrical
P0778 2-4 brake pressure control solenoid valve (2-4 brake duty solenoid) circuit malfunction
P0785 2-4 brake timing control solenoid valve (2-4 brake timing solenoid) circuit malfunction
P1086 Tumble generator valve #2 (LH) position sensor circuit low input
P1087 Tumble generator valve #2 (LH) position sensor circuit high input
P1088 Tumble generator valve #1 (RH) position sensor circuit low input
P1089 Tumble generator valve #1 (RH) position sensor circuit high input
P1090 Tumble generator valve #1 (RH) malfunction (stuck open)
P1091 Tumble generator valve #1 (RH) malfunction (stuck close)
P1092 Tumble generator valve #2 (LH) malfunction (stuck open)
P1093 Tumble generator valve #2 (LH) malfunction (stuck close)
P1094 Tumble generator valve circuit #1 (open circuit)
P1095 Tumble generator valve circuit #1 (over current)
P1096 Tumble generator valve circuit #2 (open circuit)
P1097 Tumble generator valve circuit #2 (over current)
P1110 Atmospheric pressure sensor low input
P1111 Atmospheric pressure sensor high input
P1112 Atmospheric pressure sensor range/performance problem
P1130 Front oxygen sensor circuit malfunction (open circuit)
P1131 Front oxygen sensor circuit malfunction (short circuit)
P1134 Front oxygen (A/F) sensor microcomputer problem
P1137 Front oxygen (A/F) sensor circuit range/performance problem
P1139 Front oxygen (A/F) sensor #1 heater circuit performance/range problem
P1141 Mass air flow sensor circuit range/performance problem (low input)
P1142 Throttle position sensor circuit range/performance problem (low input)
P1146 Pressure sensor circuit range/performance problem (high input)
P1230 Fuel pump control unit malfunction
P1244 Wastegate control solenoid valve malfunction (low input)
P1245 Wastegate control solenoid valve malfunction (fail-safe)
P1301 Fire due to increased exhaust temperature
P1312 Exhaust temperature sensor malfunction
P1400 Fuel tank pressure control solenoid valve circuit low input
P1420 Fuel tank pressure control solenoid valve circuit high input
P1443 Evaporative emission control system vent control function problem
P1480 Cooling fan relay 1 circuit high input
P1507 Idle control system malfunction (fail-safe)
P1510 Idle air control solenoid valve signal 1 circuit low input
P1511 Idle air control solenoid valve signal 1 circuit high input
P1512 Idle air control solenoid valve signal 2 circuit low input
P1513 Idle air control solenoid valve signal 2 circuit high input
P1514 Idle air control solenoid valve signal 3 circuit low input
P1515 Idle air control solenoid valve signal 3 circuit high input
P1516 Idle air control solenoid valve signal 4 circuit low input
P1517 Idle air control solenoid valve signal 4 circuit high input
P1518 Starter switch circuit low input
P1540 Vehicle speed sensor malfunction 2
P1544 High exhaust temperature detected
P1560 Back-up voltage circuit malfunction
P1590 Neutral position switch circuit high input
P1591 Neutral position switch circuit low input
P1592 Neutral position switch circuit (MT model)
P1594 Automatic transmission diagnosis input signal circuit malfunction
P1595 Automatic transmission diagnosis input signal circuit low input
P1596 Automatic transmission diagnosis input signal circuit high input
P1698 Engine torque control cut signal circuit low input
P1699 Engine torque control cut signal circuit high input
P1700 Throttle position sensor circuit malfunction for automatic transmission
P1701 Cruise control set signal circuit malfunction for automatic transmission
P1703 Low clutch timing control solenoid valve circuit malfunction
P1711 Engine torque control signal 1 circuit malfunction
P1712 Engine torque control signal 2 circuit malfunction
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Old 01-06-2006, 08:03 AM   #14
nu2thisSTI
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Default

Quote:
Originally Posted by Pocon
Found this, could be for future reference. _
Sorry about the length but there are a lot of codes for a WRX.

Subaru Specific OBDII Diagnostic Trouble Codes (DTC)

--------------------------------------------------------------------------------

P0031 Front oxygen (A/F) sensor heater circuit low input
P0032 Front oxygen (A/F) sensor heater circuit high input _
P0037 Rear oxygen sensor heater circuit malfunction
P0038 Rear oxygen sensor heater circuit high input
P0065 Air assist injector solenoid valve malfunction
P0066 Air assist injector solenoid valve circuit low input
P0067 Air assist injector solenoid valve circuit high input
P0101 Mass air flow sensor circuit range/performance problem (high input)
P0102 Mass air flow sensor circuit low input
P0103 Mass air flow sensor circuit high input
P0106 Pressure sensor circuit range/performance problem (low input)
P0107 Pressure sensor circuit low input
P0108 Pressure sensor circuit high input
P0111 Intake air temperature sensor circuit range/performance problem
P0112 Intake air temperature sensor circuit low input
P0113 Intake air temperature sensor circuit high input
P0117 Engine coolant temperature sensor circuit low input
P0118 Engine coolant temperature sensor circuit high input
P0121 Throttle position sensor circuit range/performance problem (high input)
P0122 Throttle position sensor circuit low input
P0123 Throttle position sensor circuit high input
P0125 Insufficient coolant temperature for closed loop fuel control
P0128 Thermostat malfunction
P0130 Front oxygen (A/F) sensor circuit range/performance problem (lean)
P0131 Front oxygen (A/F) sensor circuit range/performance problem (low input)
P0132 Front oxygen (A/F) sensor circuit range/performance problem (high input)
P0133 Front oxygen (A/F) sensor circuit slow response
P0136 Rear oxygen sensor circuit malfunction
P0139 Rear oxygen sensor circuit slow response
P0171 Fuel trim malfunction (A/F too lean)
P0172 Fuel trim malfunction (A/F too rich)
P0181 Fuel temperature sensor A circuit range/performance problem
P0182 Fuel temperature sensor A circuit low input
P0183 Fuel temperature sensor A circuit high input
P0244 Wastegate control solenoid valve malfunction (high input)
P0245 Wastegate control solenoid valve circuit low input
P0246 Wastegate control solenoid valve circuit high input
P0301 Cylinder 1 misfire detected
P0302 Cylinder 2 misfire detected
P0303 Cylinder 3 misfire detected
P0304 Cylinder 4 misfire detected
P0327 Knock sensor circuit low input
P0328 Knock sensor circuit high input
P0335 Crankshaft position sensor circuit malfunction
P0336 Crankshaft position sensor circuit range/performance problem
P0340 Camshaft position sensor circuit malfunction
P0341 Camshaft position sensor circuit range/performance problem
P0420 Catalyst system efficiency below threshold
P0442 Evaporative emission control system malfunction
P0444 Evaporative emission control system purge control valve circuit low input
P0445 Evaporative emission control system purge control valve circuit high input
P0447 Evaporative emission control system vent control low input
P0448 Evaporative emission control system vent control high input
P0451 Evaporative emission control system pressure sensor range/performance problem
P0452 Evaporative emission control system pressure sensor low input
P0453 Evaporative emission control system pressure sensor high input
P0456 Evaporative emission control system malfunction
P0457 Evaporative emission control system leak detected (fuel cap loose/off)
P0461 Fuel level sensor circuit range/performance problem
P0462 Fuel level sensor circuit low input
P0463 Fuel level sensor circuit high input
P0464 Fuel level sensor intermittent input
P0480 Cooling fan relay 1 circuit low input
P0483 Cooling fan function problem
P0500 Vehicle speed sensor malfunction
P0506 Idle control system RPM lower than expected
P0507 Idle control system RPM higher than expected
P0508 Idle control system circuit low input
P0509 Idle control system circuit high input
P0512 Starter switch circuit high input
P0545 Exhaust gas temperature sensor circuit low input
P0546 Exhaust gas temperature sensor circuit high input
P0604 Internal control module memory check sum error
P0703 Brake switch input malfunction
P0705 Transmission range sensor circuit malfunction
P0710 Transmission fluid temperature sensor circuit malfunction
P0715 Torque converter turbine speed sensor circuit malfunction
P0720 Output speed sensor (vehicle speed sensor 2) circuit malfunction
P0725 Engine speed input circuit malfunction
P0731 Gear 1 incorrect ratio
P0732 Gear 2 incorrect ratio
P0733 Gear 3 incorrect ratio
P0734 Gear 4 incorrect ratio
P0741 Torque converter clutch system malfunction
P0743 Torque converter clutch system (Lock-up duty solenoid) electrical
P0748 Pressure control solenoid (Line pressure duty solenoid) electrical
P0753 Shift solenoid A (Shift solenoid 1) electrical
P0758 Shift solenoid B (Shift solenoid 2) electrical
P0778 2-4 brake pressure control solenoid valve (2-4 brake duty solenoid) circuit malfunction
P0785 2-4 brake timing control solenoid valve (2-4 brake timing solenoid) circuit malfunction
P1086 Tumble generator valve #2 (LH) position sensor circuit low input
P1087 Tumble generator valve #2 (LH) position sensor circuit high input
P1088 Tumble generator valve #1 (RH) position sensor circuit low input
P1089 Tumble generator valve #1 (RH) position sensor circuit high input
P1090 Tumble generator valve #1 (RH) malfunction (stuck open)
P1091 Tumble generator valve #1 (RH) malfunction (stuck close)
P1092 Tumble generator valve #2 (LH) malfunction (stuck open)
P1093 Tumble generator valve #2 (LH) malfunction (stuck close)
P1094 Tumble generator valve circuit #1 (open circuit)
P1095 Tumble generator valve circuit #1 (over current)
P1096 Tumble generator valve circuit #2 (open circuit)
P1097 Tumble generator valve circuit #2 (over current)
P1110 Atmospheric pressure sensor low input
P1111 Atmospheric pressure sensor high input
P1112 Atmospheric pressure sensor range/performance problem
P1130 Front oxygen sensor circuit malfunction (open circuit)
P1131 Front oxygen sensor circuit malfunction (short circuit)
P1134 Front oxygen (A/F) sensor microcomputer problem
P1137 Front oxygen (A/F) sensor circuit range/performance problem
P1139 Front oxygen (A/F) sensor #1 heater circuit performance/range problem
P1141 Mass air flow sensor circuit range/performance problem (low input)
P1142 Throttle position sensor circuit range/performance problem (low input)
P1146 Pressure sensor circuit range/performance problem (high input)
P1230 Fuel pump control unit malfunction
P1244 Wastegate control solenoid valve malfunction (low input)
P1245 Wastegate control solenoid valve malfunction (fail-safe)
P1301 Fire due to increased exhaust temperature
P1312 Exhaust temperature sensor malfunction
P1400 Fuel tank pressure control solenoid valve circuit low input
P1420 Fuel tank pressure control solenoid valve circuit high input
P1443 Evaporative emission control system vent control function problem
P1480 Cooling fan relay 1 circuit high input
P1507 Idle control system malfunction (fail-safe)
P1510 Idle air control solenoid valve signal 1 circuit low input
P1511 Idle air control solenoid valve signal 1 circuit high input
P1512 Idle air control solenoid valve signal 2 circuit low input
P1513 Idle air control solenoid valve signal 2 circuit high input
P1514 Idle air control solenoid valve signal 3 circuit low input
P1515 Idle air control solenoid valve signal 3 circuit high input
P1516 Idle air control solenoid valve signal 4 circuit low input
P1517 Idle air control solenoid valve signal 4 circuit high input
P1518 Starter switch circuit low input
P1540 Vehicle speed sensor malfunction 2
P1544 High exhaust temperature detected
P1560 Back-up voltage circuit malfunction
P1590 Neutral position switch circuit high input
P1591 Neutral position switch circuit low input
P1592 Neutral position switch circuit (MT model)
P1594 Automatic transmission diagnosis input signal circuit malfunction
P1595 Automatic transmission diagnosis input signal circuit low input
P1596 Automatic transmission diagnosis input signal circuit high input
P1698 Engine torque control cut signal circuit low input
P1699 Engine torque control cut signal circuit high input
P1700 Throttle position sensor circuit malfunction for automatic transmission
P1701 Cruise control set signal circuit malfunction for automatic transmission
P1703 Low clutch timing control solenoid valve circuit malfunction
P1711 Engine torque control signal 1 circuit malfunction
P1712 Engine torque control signal 2 circuit malfunction
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Old 01-15-2003, 06:04 PM   #15
munkis
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Jon
Well since you have reported the post for no good reason as at all
if the super mods see fit that it is not viable then so be it.

Why are you insisting on arguing, is this thread really bothering you? Dont click on it if it is. Why are you beings so apposed to a thread that is designed to help?

WRX ce lights and WRX codes have absolutly nothing to do with the rest of the subaru line, so please give it a rest.

Im politly asking you, if you have nothing to contribute to this thread that is pertinent and helpful, do not post here.

thanks

Jay
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Old 01-15-2003, 07:26 PM   #16
Torch
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P1443 Evaporative emission control system vent control function problem


I got this one today. I have a 02 WRX Auto. Mods are exhaust, Unichip, intercooler hoses, and CAI.

Does anyone know what this means?

Thanks,
Torch
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Old 01-15-2003, 09:03 PM   #17
munkis
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There is a soleniod that is controled by the ecu that is activated, when circusmstances are met for evaporative emmissions to be vented back into the engine.

I dont think any of your mods would affect that function. Since you do have mods, and ya know how finicky subaru is, you may want to just clear the code and see if it comes back, if it does I would take it to the dealer and have it checked.

Jay
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Old 01-15-2003, 09:48 PM   #18
Jon [in CT]
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I don't know why Torch's search on that trouble code failed to uncover the WRX Check Engine Light Log thread. A quick scan of that thread will reveal at least 30 reports of this trouble code. In most cases, including mine, the problem was resolved by sending the ECU to Subaru HQ for a reflash.
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Old 01-16-2003, 12:51 AM   #19
Impulsivegoat23
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Code: P0031, Front oxygen (A/F) sensor heater circuit low input.
Year/Make Model: 2002 Impreza RS
Mileage: Approx. 7k
Fix: (general) Replace/Clean front O2 Sensor
(my case) Plug front O2 sensor back in

Mods: Ganzflow Intake, K&N Panel filter, Borla Header (wrapped), Apex'i N1 Exhaust.
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Old 01-16-2003, 05:57 AM   #20
lakepop
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Well .....2 of the most common reasons for a non blinking CEL:

1. not tightening the gas cap
2. overfilling the tank by trying to round off the sale to some $.


Other common reasons are O2 sensor and knock sensor.

I personally had the overfill problem which I fixed with a reset.

OK...just my .02
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Old 02-04-2006, 09:21 PM   #21
ghschirtz
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Post thanks for the hint

Quote:
Originally Posted by lakepop
Well .....2 of the most common reasons for a non blinking CEL:

1. not tightening the gas cap
2. overfilling the tank by trying to round off the sale to some $.


Other common reasons are O2 sensor and knock sensor.

I personally had the overfill problem which I fixed with a reset.

OK...just my .02
I have been probably overfilling by your definition. I will try to avoid that after I get the CEL reset again. I am good about keeping the cap tight, but admit to trying to fully fill the tank.
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Old 02-12-2006, 03:15 AM   #22
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MY 01 RS 59k miles

p0420...keep reading that it's the catalytic converter rather than O2 sensors. I have had this code read before and pep boys told me to do a tune up. i refused because I had a tune up 500 miles previously. i had them change my O2 sensor and cel went away. (stock)

i took it to my dealership to flush my radiator and for the recall on the ecu. they did that and a full tune up at no charge by mistake. in any case, 3 months later, the P0420 has come back. I have a code reader so i'll be erasing it and if it comes back, i'm going to my dealership to get my cat replaced. (at this point have cobb cai and did the grounding mod last wknd)
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Old 12-18-2006, 06:21 AM   #23
MYnewWRX
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Quote:
Originally Posted by lakepop View Post
Well .....2 of the most common reasons for a non blinking CEL:

1. not tightening the gas cap
2. overfilling the tank by trying to round off the sale to some $.


Other common reasons are O2 sensor and knock sensor.

I personally had the overfill problem which I fixed with a reset.

OK...just my .02

is that proven..because i tell you what..all 3 times I gassed up, I guess you can say I filled her to the max (got a little that dripped to the ground ooops).making sure I made the sale a round dollar number...and I got 3 CEL--all Evap codes....can this be my problem ???
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Old 01-18-2003, 07:43 PM   #24
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My wife's car:

'96 Outback Auto, 2.5, 155k miles, stock

PO 400 - EGR Flow Malfunction

Has had the code for quite some time. The CEL comes on about every 50-100 miles after clearing the code. Doesn't effect driveability at all.
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Old 01-21-2003, 10:16 AM   #25
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I got a check engine light last night but I have yet to get it pulled, I will be doing that after work today. But since were on the topic of Check Engine lights. When you pull a code don't you have to connect the two green harnesses and two black harnesses under the dash? Is that what there used for? Someone told me this and I'm not sure. The reason I ask this is cause I have both the green harness and one black harness and to black wires dangling there which seemed to go in the other black harness? I noticed when I had my dash of the other day but I have never touched them before or have ever had any codes pulled off my car before? Do you think Subaru will fix this for free, even though I have 78k miles now? Its there fault, they forgot the harness.

I'm not sure yet of what the code is but I'm pretty sure whats causing it. I just installed 2 10" subs and 2 222W amps and I already had a light weight battery. The lights dim evertime the bass hits even when going 70 mph at 3k rpm. I don't think the ignition getting enough power to fire properly.
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