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#1
05-07-2006, 02:00 PM
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bank 1 oxygen sensor
hello all... i recently had a mechanic change the bank 1 oxgen sensor (the one before the convertor)....but the problem now is the service engine soon light keeps coming back on for the same problem....he erased it and i erased from the code.....i dont know what to do!!......p.s...i keep erasing it with a OBD2 code reader machine.......thank you!!!!!
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#2
05-08-2006, 01:18 PM
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Re: bank 1 oxygen sensor
What code is he getting? It's possible that it's not plugged in, was a faulty sensor, has gone bad like the former, wire damage, etc.
__________________
Vinyl adds horsepower, right?
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#3
05-08-2006, 05:26 PM
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Re: bank 1 oxygen sensor
Quote:
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#4
05-08-2006, 09:45 PM
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Re: bank 1 oxygen sensor
That is a DTC for fuel trim lean. The HO2S is probably doing it's job, you need to find what is causing the HO2S to stay lean. You probably have a vacuum leak somewhere or low/restricted fuel pressure. You're not running E-85 are you? I promise you that E-85 will set lean codes with that vehicle or any other vehicle not designed for E-85.
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ASE Master ASE Advanced Engine performance GM World Class Technician 1978 Pontiac Trans Am 1984 Monte Carlo SS 1991 GMC C1500 2002 Pontiac Grand Prix
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#6
05-11-2006, 10:03 PM
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Re: bank 1 oxygen sensor
85% ethanol fuel
If you read some other posts about ethanol you will see that you need a richer air/fuel ratio with ethanol
__________________
ASE Master ASE Advanced Engine performance GM World Class Technician 1978 Pontiac Trans Am 1984 Monte Carlo SS 1991 GMC C1500 2002 Pontiac Grand Prix
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