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P1128 Diagnostic Trouble Code Discussion for June 2007

Closed Loop Fueling Not Achieved - Bank 1

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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2001 Audi A6 Quattro 4.2L MIL Lamp on VIN: WAUZL64B01
P1128: Bank 1 Mixture Adaption System too lean. ... with the same codes. P17536 & 17538 I have no information on and there is nothing in mitchell for these codes. As for the P1128 we have checked for vacuum leaks with smoke machine, monitored O2 sensors, Checked fuel pressure and the regulator. The MAF ...
June 28, 2007