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P1128 Diagnostic Trouble Code Discussion for October 2005

Closed Loop Fueling Not Achieved - Bank 1

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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2000 Volkswagen Passat GLS 1.8L MIL Lamp on VIN: WVWMA23B1Y
P1128: o2 signal issue. All ,in previous notes
October 04, 2005
2000 Volkswagen Beetle GLS 2.0L MIL Lamp on VIN: 3VWCA21C2Y
P1128: Long term fuel trim bank 1 too lean. This is just one particular car but we have about 4 of these Beetles that are setting these codes on a regular basis. Some cars will have both codes stored. Others one code or the other. We have tried oxygen sensors, checked fuel pressure, checked regulators, ...
October 05, 2005