po171 & po174 codes
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po171 & po174 codes
ok for the past week or so i've been getting a check engine code, yesterday the car started running rough so i plugged in my scanner and came up with the 2 codes mentioned above, it's the bank 1 sensor 1 and bank 1 sensor 2, the cars been tuned for going on 2 years and the rear o2's are deleted, i just changed the 2 upstream sensors last year cuz i got a check engine light, do you think i need to change them again or could it be something else?
#2
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ok for the past week or so i've been getting a check engine code, yesterday the car started running rough so i plugged in my scanner and came up with the 2 codes mentioned above, it's the bank 1 sensor 1 and bank 1 sensor 2, the cars been tuned for going on 2 years and the rear o2's are deleted, i just changed the 2 upstream sensors last year cuz i got a check engine light, do you think i need to change them again or could it be something else?
I figured out it was because my MAF was descreened. I put a saxonpc screen in, haven't seen the codes since. Don't go directly to your O2s on this, it may be as easy as cleaning your MAF.
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yes as a matter in fact it is descreened, i'll have to try that, or just get a replacement one, its funny though cuz i went out and started it today and everything was fine, no check engine light or anything