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P1128 Diagnostic Trouble Code Discussion for December 2008

Closed Loop Fueling Not Achieved - Bank 1

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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2001 Volkswagen Cabrio GLX 2.0L MIL Lamp on VIN: 3VWDC21V41
P1128: bank 1 mixture adapt sys too lean. Car first came in with above codes and a bunch of short to ground codes. Replaced main relay and no more short codes but still getting the Mass air flow and fuel trim codes. On test drives i have noticed that the fuel trim is fine for a while but then seems to...
December 19, 2008