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P1128 Diagnostic Trouble Code Discussion for March 2007

Closed Loop Fueling Not Achieved - Bank 1

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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
2000 Volkswagen Beetle GL 1.8L Hesitation VIN: WVUAF61C1Y
P1128: Long Term Fuel Trim B1 System Too Lean. ... litre turbo (aph) engine code. he had replaced the engine due to unknown reasons. after swap, he had a hesitation on accel. he then proceeded to replace ecm, fuel pressure regulator, fuel pump, maf sensor, intercooler and i think the turbo as well. after h...
March 20, 2007
1999 Volkswagen Beetle GLS 2.0L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 3VWCC21C4X
P1128: fuel trim system too lean. This Beetle starts and idles fine but stumbles when the throttle is pushed. It revs smooth if you push the throttle slowly. At full throttle no load the engine leans out chokes then starts to surge. Classic MAF problem but the new MAF nor a known good one off ...
March 22, 2007