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Old 10-05-2010, 06:54 PM   #1
leg1999
Scooby Newbie
 
Member#: 201993
Join Date: Feb 2009
Chapter/Region: NWIC
Vehicle:
99 legacy 30th anv
Low and slow, RIP, 97 LGT

Default P0102 engine code

Apparently my MAf sensor went out. I replaced it with a reman. from shucks because they're so damn expensive! Before fighting with the people at shcucks telling them that the reman. MAf I got is bad, I would like to know if anybody knows what could be causing my problems. The car starts and will idle fine when you give it the gas it will lug for a second and then kick up to power. I have the p0102 check engine light code on which means MAF circuit low input. I've checked the wires, hoses, air leaks and I can't find anything. Anything else I should be checking before I warranty this "new" one?
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Old 10-06-2010, 11:38 PM   #2
PhilSine
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Member#: 130489
Join Date: Oct 2006
Chapter/Region: MWSOC
Location: Superior, WI
Vehicle:
02 WRX Wagon (WRB)
98 OBS-T, 91 Legacy SS

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Make sure you do an ECU reset by disconnecting both battery terminals and touching them together for about 10 seconds to clear the system of all charge.
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Old 10-07-2010, 03:38 PM   #3
leg1999
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Member#: 201993
Join Date: Feb 2009
Chapter/Region: NWIC
Vehicle:
99 legacy 30th anv
Low and slow, RIP, 97 LGT

Default

ohhh, I didn't take off both battery terminals, I only disconnected one. I'll try that, thanks!
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Old 10-07-2010, 04:43 PM   #4
RedMonkey999
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Member#: 191476
Join Date: Oct 2008
Chapter/Region: NWIC
Location: Olympia, WA
Vehicle:
2002 2.5RS AW
2007 FXT OBP

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You can also just take one off and depress the brake pedal for 30 seconds or so (discharges capacitors using the brake light).
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Old 10-07-2010, 07:55 PM   #5
leg1999
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Member#: 201993
Join Date: Feb 2009
Chapter/Region: NWIC
Vehicle:
99 legacy 30th anv
Low and slow, RIP, 97 LGT

Default

Well, I pulled off both termianls and she is still running bad. I forgot to mention, the first MAf I got wasn't working right. I picked up another remanned which is working correct and my car still bring up the p0102 code and i've also been recieving misfires on cylinders 1,2 and 3.
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Old 10-07-2010, 08:37 PM   #6
leg1999
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Member#: 201993
Join Date: Feb 2009
Chapter/Region: NWIC
Vehicle:
99 legacy 30th anv
Low and slow, RIP, 97 LGT

Default

I'm thinking the computer is having problems. I've replaced spark plugs, coil pack, MAf sensor, don't see any leaks, any frayed wires. Looks like I need to do a full wrx swap..
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Old 10-10-2010, 12:20 AM   #7
leg1999
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Member#: 201993
Join Date: Feb 2009
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Vehicle:
99 legacy 30th anv
Low and slow, RIP, 97 LGT

Default

Reading a p0103 code now. Very confused.
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Old 10-10-2010, 03:15 AM   #8
renyo
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Join Date: Aug 2005
Chapter/Region: MAIC
Location: Orlando, unfortunately
Vehicle:
98 Impreza

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When my MAF died it was throwing both a P0102 and a P0103 code at the same time. When I got a new MAF everything worked fine.
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Old 10-10-2010, 06:52 PM   #9
leg1999
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Member#: 201993
Join Date: Feb 2009
Chapter/Region: NWIC
Vehicle:
99 legacy 30th anv
Low and slow, RIP, 97 LGT

Default

Hmm, it seems like my maf has been going "bad". I was running 35% fuel to air before i put the reman. MAF in and my car would barely run. It would jump when giving it the gas and sputter and would die when at idle. Did this happen to you? i've replaced the MAF and have continuing problems, codes and the car is still jumpy and doesn't have full power.
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Old 10-10-2010, 11:00 PM   #10
williaty
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Chapter/Region: MWSOC
Location: Delaware County, Ohio
Vehicle:
2005 2.5RS Wagon
Regal Blue Pearl

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It's a possibility that your MAF sensor is fine but the wiring is bad. Take a MAF sensor out of a working car and test it in yours. If the problem persists, the wires are the culprit.
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Old 10-11-2010, 08:02 AM   #11
Storm
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Chapter/Region: MWSOC
Location: SAUL'S Motorsports
Vehicle:
96L Most Over-
Developed Beater

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Also check the integrity of the tubing before and after the MAF. The '99 MAF is not a robust unit. Little things as an over oiled airfilter have been known to kill them quickly. IIRC, the sensor itself can be bought separately from the housing....for much less than a complete unit.

Jay
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Old 10-11-2010, 11:52 AM   #12
leg1999
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Member#: 201993
Join Date: Feb 2009
Chapter/Region: NWIC
Vehicle:
99 legacy 30th anv
Low and slow, RIP, 97 LGT

Default

My father and I checked the wiring yesterday all the way back to the ECU. I'm stumped, he thinks I need a factory MAF so I believe that's what's going to happen.
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Old 06-26-2011, 06:12 PM   #13
08wrx08
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Default

i have the same problem with my 08 wrx. there is a cut in a wire going to the connector. double check your wires. i did wire testing a couple times and it was reading fine the first time and second time the bad wire was only reading intermittly.
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