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P1128 Diagnostic Trouble Code Discussion for March 2010

Closed Loop Fueling Not Achieved - Bank 1


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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2001 Volkswagen Passat GLS 1.8L Poor Idle Quality, Surge VIN: WVWAC63B11
P1128: Fuel trim b1 lean. Came in with rough/surging idle, check engine light on, and higher speed surge (3000rpm) Check for vacuum leaks (smoked through fuel pressre regulator vaccum port and plugged intake hose before t body)No vacuum leaks found. Test maf with lab scope. Determined ...
March 07, 2010
2001 Volkswagen Passat GLS 1.8L Poor Idle Quality, Surge VIN: WVWAC63B11
P1128: Fuel trim b1 lean. Came in with rough/surging idle, check engine light on, and higher speed surge (3000rpm) Check for vacuum leaks (smoked through fuel pressre regulator vaccum port and plugged intake hose before t body)No vacuum leaks found. Test maf with lab scope. Determined ...
March 07, 2010