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P2178 Diagnostic Trouble Code Discussion for July 2020

Fuel System Too Rich At Off Idle


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Trouble Ticket Help Requests for DTC P2178
Help Request Posted
2010 Audi A4 Quattro Avant 2.0L Rich VIN: WAUWFAFL2A
P2178: fuel system too rich at part throttle. We need some help with this Audi A4. It has a rich condition and we can't seem to find the cause. It had a code for the O2 sensor (fuel ratio sensor) so that was replaced. At a previous visit the vehicle had both the crankcase vent and the oil separator re...
July 16, 2020