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Old 11-24-2003, 04:46 PM   #1
Kevin Thomas
Street Racing Instructor
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Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

Default P0183 Fuel Temp Sensor A Help

I've had a trouble code on my 1997 Subaru Impreza for years. Now I HAVE to do something about it because I failed inspection due to it.

The trouble code is P0183 (Fuel Temperature Sensor A, Circuit High Input). I have no idea how to get rid of it since I have no Factory Service Manual to give me guidance. I did read one response from another thread someone asked about this. The response stated to check the connection at the ECU (PnP and/or Unichip).

I don't know if this is relevant but I have had two different fuel controllers on this car. First one was a Hyper Field SFC unit and the 2nd one was an Apexi SAFC. The trouble code has been around way back when I hade my Hyper Field SFC so I don't know when it actually started.

If it is a connection at the ECU, can someone please tell me what wire I need to check to reconnect to make this trouble code go away? In the meantime, I'll continue to look at the ECu wiring to see if I can find it. Thanks!
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Old 11-24-2003, 04:54 PM   #2
Subaru IMP VR
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Member#: 49070
Join Date: Nov 2003
Location: The Drive..!!
Vehicle:
1989 Toyota Camry Le
13.983 1/4 at 112Mph

Default

Check your fuses and if not replace the sensor.....

BUMP... Hope someone can help.....
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Old 11-24-2003, 04:58 PM   #3
Kevin Thomas
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Member#: 110
Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

Default Thanks

Thanks Subaru IM VR,

I'll recheck my fuses but last I checked they were fine. I did go to Waynes website just now at:
http://wac.addr.com/auto/obs/ecu1.gif
and
http://wac.addr.com/auto/obs/ecu3.gif

It shows the fuel temperature sensor terminal is #25 but it also states that this terminal is for the 1800cc model only. ??? I'll check my fuses tomorrow when I get off of work and then look at this terminal even though I don't have an 1800cc engine.

Any other suggestions, I'll follow through on also if these don't work. Thanks again!
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Old 11-24-2003, 05:06 PM   #4
Subaru IMP VR
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Member#: 49070
Join Date: Nov 2003
Location: The Drive..!!
Vehicle:
1989 Toyota Camry Le
13.983 1/4 at 112Mph

Default

N/P Hopfully it is just a fuse and nothing major......

Bump Comon Gurus and Specialists
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Old 11-24-2003, 06:23 PM   #5
Legacy777
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Location: Houston, Tx
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1990 Legacy & 97 OBS
AWD 6MT EJ22T AWIC Swap

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we had a similar post on the USMB about the fuel temp sensors. not sure if a specific solution has been found yet, but you may want to check it out.

http://usmb.ultimatesubaru.net/forum...ht=fuel+sensor
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Old 11-24-2003, 07:27 PM   #6
Kevin Thomas
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Location: 1997 OBS, 1996 SVX, 1988 RX
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1989 1989 XT6

Default Thanks

Quote:
Originally posted by legacy777
we had a similar post on the USMB about the fuel temp sensors. not sure if a specific solution has been found yet, but you may want to check it out.

http://usmb.ultimatesubaru.net/forum...ht=fuel+sensor

Thanks for posting the thread. That's a coincidence! I posted there as, 'Myxalplyx'.
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Old 11-25-2003, 03:44 AM   #7
Kevin Thomas
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Join Date: Jul 1999
Location: 1997 OBS, 1996 SVX, 1988 RX
Vehicle:
1989 1989 XT6

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I'm posting info I found at another site that I had already posted at the USMB site. I'm posting it here for reference in case anyone needs it in the future, looking up this code in the database. Good luck!

"Just was browsing the internet trying to find more information about this code.

On this site:
http://www.visi.com/~rhanson/obdII_codes-full-text.htm

It says this,

Code:
P0183 Engine Fuel Temperature Sensor A Circuit High Input

Description:
The comprehensive component monitor (CCM) monitors the EFT sensor circuit to the PCM for high voltage. If voltage were to exceed a calibrated limit and a calibrated amount of time during testing, the test will fail.

Possible Causes:
*Open or Short to power in harness*
*Damaged EFT Sensor*
*Improper harnes connection*
*Damaged PCM*

Diagnostic Aides
Verify EFT-PID value to determine open or short"
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Old 11-25-2003, 10:26 AM   #8
Legacy777
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Location: Houston, Tx
Vehicle:
1990 Legacy & 97 OBS
AWD 6MT EJ22T AWIC Swap

Default Re: Thanks

Quote:
Originally posted by Kevin Thomas
Thanks for posting the thread. That's a coincidence! I posted there as, 'Myxalplyx'.
welcome
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