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Old 01-10-2007, 11:51 AM   #1
sc00ter
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Member#: 117767
Join Date: Jun 2006
Chapter/Region: RMIC
Location: Denver, CO
Vehicle:
2011 STI Sedan
DGM

Default 02 Sensor or MAF sensor??

Would a bad MAF have anything to do with low idling rpm's (idling below 500 rpms with random jumps up to 800 rpm's) as well as power dips around 2k - 3k rpms in almost every gear?

If not the MAF, then could it be the 02 sensor?

CEL code is P0131 ( 02 in bank 1 to lean) by the way

Thanks for any help.
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Old 01-11-2007, 02:38 AM   #2
Pakin
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Join Date: Apr 2002
Chapter/Region: International
Location: Date Line Denies F-22s
Vehicle:
MY95 Impreza 207C
MY05 Forester 257X

Default

It can be both. But from the CEL, it would point more the the front O2/front A/F sensor.

-paK +1
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Old 01-11-2007, 08:46 AM   #3
sc00ter
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Location: Denver, CO
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DGM

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thanks for the info.
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Old 01-11-2007, 10:49 AM   #4
crampfan
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Chapter/Region: MWSOC
Location: clarksville AR
Vehicle:
2004 wrx wag
black UTEC stg 4

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You need to check anything that can cause a lean cond. Map sensor, fuel filter/pump, plugged injectors, vacuum leak, air leak between the map and throttle body. O2 code is prob. the result not the cause.
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