camross998

iTrader: (2)

these are the codes i pulled out of the pcm

P0131: O2 sensor circuit low voltage (B1S1 = Front left sensor)
P0137: O2 sensor circuit low voltage (B1S2 = Rear left sensor)
P0151: O2 sensor circuit low voltage (B2S1 = Front right sensor)
P0157: O2 sensor circuit low voltage (B2S2 = Rear right sensor)
P0171: [Fuel] System too lean, (B1 = Left bank of motor)
P0174: [Fuel] System too lean, (B2 = Right bank of motor)

I was told that it near impossible for all four O2 sensor to go bad at once i checked the connection and wire at all the sensors near the exhast came up with nuthing can anybody help me out

staringback05

iTrader: (8)

have you done any work to the car? what made this come about or how long has it been going on?....i have a few ideas of why those codes could be up....but i would like some more info

CRAGER

Very common problem is the hose after your PCV valve tearing open. Check for any vacum leaks, air coming in after the MAF is then not metered and will cause your car to run lean.

Good luck, and post up what it was man.

Peace,
Craig.

ponygt65

I agree....did you do anything to the car? Or did you just get an SES light one day?

staringback05

iTrader: (8)

hmm my experiences with unmetered air, were usually the car will run fat....considering the computer is trying to make up for the excess air that it reads in the o2s....it will dump more fuel in....as much as 14-25%, until the car throws a "running rich" code and closes it down to 2-7% until the problem is resolved.....

i wouldnt be suprised if this is a "i ported my maf" problem