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P1129 Diagnostic Trouble Code Discussion for October 2009

Closed Loop Fueling Not Achieved (Bank 2)

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Trouble Ticket Help Requests for DTC P1129
Help Request Posted
1999 Audi A6 Quattro 2.8L No Start, MIL Lamp on VIN: WAUDA34BXX
P1129: fuel trim bank 2 system too rich. audi tech, please help. car came in with misfire code, evap code and lean code. replace plugs, evap puge valve, decarbon engine and seal up major leak at throttle area. all other problem are gone, but car start [...] run very rich. also customer experience som...
October 19, 2009