AudiWorld Forums - Could it be an O2 sensor?

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loquaciousnjguy

08-05-2012 07:59 PM

Could it be an O2 sensor?

I received P0411, P1128, P1137 and P1139 codes, with a Check Engine light brightly shining. Could it be an O2 sensor that needs replacement?

loquaciousnjguy

08-05-2012 08:02 PM

Sorry. It's a '99 A4 Quattro 2.8 with 140,000miles, but I find i need to use Tiptronic accelerating uphill.

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