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P1128 Diagnostic Trouble Code Discussion for April 2005

Closed Loop Fueling Not Achieved - Bank 1


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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2001 Volkswagen Jetta GL 2.0L Excessive Emissions, MIL Lamp on VIN: 3VWR529M61
P1128: manufacturer controlled fuel and air metering. ... for this problem. the first time sensor 1 was not switching. we replaced the front o2 sensor and all fuel trim values returned to normal and the o2 was switching properly. now the vehicle has returned with a p1128 as a cur...
April 04, 2005
2001 Volkswagen Cabrio GLS 2.0L MIL Lamp on VIN: 3VWCC21V51
P1128: VAG17536 LTFT too lean bank one. ... water pump and tires on out of state car. Came back 2 days later with CEL. We're not sure if CEL was on before or not, owner not real clear on this. Code P1128 LTFT too lean (VAG 17536). I checked all vacuum lines for leaks/damage, none found. I double che...
April 19, 2005
1999 Volkswagen Jetta GLS 2.0L Hesitation VIN: 3VWSC29M7X
P1128: Long term fuel trim-system too lean. Customer dropped off vehicle and complained about poor running and a real bad hesitation. Verified complaint. Secondary ignition wires were arcing all over. Replaced ignition wires and throughly cleaned coil pack assembly. Checked coolant temp sensor-was readi...
April 25, 2005
2001 Volkswagen Jetta GL 2.0L Excessive Emissions, MIL Lamp on VIN: 3VWR529M61
P1128: manufacturer controlled fuel and air metering. ... for this problem. the first time sensor 1 was not switching. we replaced the front o2 sensor and all fuel trim values returned to normal and the o2 was switching properly. now the vehicle has returned with a p1128 as a cur...
April 04, 2005
2001 Volkswagen Cabrio GLS 2.0L MIL Lamp on VIN: 3VWCC21V51
P1128: VAG17536 LTFT too lean bank one. ... water pump and tires on out of state car. Came back 2 days later with CEL. We're not sure if CEL was on before or not, owner not real clear on this. Code P1128 LTFT too lean (VAG 17536). I checked all vacuum lines for leaks/damage, none found. I double che...
April 19, 2005
1999 Volkswagen Jetta GLS 2.0L Hesitation VIN: 3VWSC29M7X
P1128: Long term fuel trim-system too lean. Customer dropped off vehicle and complained about poor running and a real bad hesitation. Verified complaint. Secondary ignition wires were arcing all over. Replaced ignition wires and throughly cleaned coil pack assembly. Checked coolant temp sensor-was readi...
April 25, 2005