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P1128 Diagnostic Trouble Code Discussion for March 2006

Closed Loop Fueling Not Achieved - Bank 1

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Trouble Ticket Help Requests for DTC P1128
Help Request Posted
1999 Volkswagen Beetle GL 2.0L Hesitation, Cuts out VIN: 3VWBA21CXX
P1128: lean bank one. This vehicle runs great after it has run for a couple of kilometers. When you first start up cold (below 5 degrees c.) the engine starts fine but if you take off on the road right away and attempt a medium to heavy acceleration the engine falls flat on its fac...
March 02, 2006
2000 Volkswagen Beetle GLS 2.0L Hesitation VIN: 3VWCC21C8Y
P1128: lean. after above repairs car runs bad on initial cold start,somewhat better when warm but still stumbles like it is lean
March 29, 2006