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Check Engine Light due to catalytic converter faults on Volkswagen Passat W8

Problem Description and Possible Solution

Check Engine Light illumination can be related to catalytic converter faults, which will require a re-flash of the ECM or replacement of the catalytic converter.

Problem Data
RepairPal Verified
Average mileage: (–)
Exhaust & Emissions affected: 4.0L V8
1 model year affected: 2004
1 person reported this problem