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Old 10-06-2005, 09:03 PM
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Default system to rich

i keep getting 2 codes.

1. P0172 system to rich (bank 1)
2. P0175 system to rich (bank 2)

Can anyone tell me whats wrong and what i need to do?
Old 10-07-2005, 02:52 PM
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When did you start getting those codes?
Did you make any mechanical changes just prior to getting those codes?
Did you make any tuning changes just prior to getting those codes?
What car do you have?
What modifications have you done?
Did you get both codes at the same time or did one appear before the other?
Do you have recent history on any other codes?
Is there any other information that you can supply to help in the diagnosis?
Old 10-08-2005, 08:51 PM
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i got codes back in may.
i have a 99 TA auto 2.73
no tune....i reset computer to make sure
mods.. free mods, CAI, and cat-back
i got boyh codes at the same time
no other codes

i changes my plugs today and they were gaped at .075 (this was my first time changing plugs since i got car in may....so i dont know why the people had it gapped like that before me). so i bought some ngk tr55 and put them in and gapped them at .055. no codes popped up yet

i also had k&n oil on my MAF, but no codes came up for that. i cleaned it with electric contact cleaner...didnt touch wires.
Old 10-10-2005, 10:25 PM
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help needed
Old 10-29-2005, 04:54 PM
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Have you figured this out yet? I'm also getting these codes. Usually they are preceded by P0154 and p0158 though. It seems intermittent and I can actually smell fuel from the exhaust while the car idles. I've been working on leaning out the mixture at idle, but I'm wondering if there is something else that may be tricking her into getting so rich in the first place.
Old 10-29-2005, 05:29 PM
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put a fuel pressure gauge on it to see if your fuel pressure is dropping while the car is off (leaking injectors) or try a know good MAF sensor




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