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P0431 Diagnostic Trouble Code Discussion for June 2006

Warmup Catalyst System Efficiency Low (Bank 2)

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Trouble Ticket Help Requests for DTC P0431
Help Request Posted
2000 Volkswagen Passat GLS 2.8L MIL Lamp on VIN: WVWTH23BOY
P0431: Catalyst efficency Bank 2. Ok trying to help out family members car with MIL on for OBII test. I am a RI emissions facility. This car is registered in Mass. Both banks for cat efficency codes come up. However the car runs perfect and has near zero emissions so obviously the cats are doi...
June 26, 2006