Audi, A6, C7, 2.0 TDI Ultra (2014-) Common Issues
1. Faulty Oil Pressure Sensor
Occurrence: 12.5%Cost to repair: $350Symptoms:
Check Engine Light on, oil pressure warning light on
2. Purging System Fault
Occurrence: 15.6%Cost to repair: $700Symptoms:
White smoke from exhaust, poor engine performance
3. Faulty DPF (Diesel Particulate Filter)
Occurrence: 8.2%Cost to repair: $1200Symptoms:
DPF warning light on, reduced engine power
4. Boost Pressure Sensor Fault
Occurrence: 9.5%Cost to repair: $450Symptoms:
Check Engine Light on, boost pressure warning light on
5. Clogged Fuel Filter
Occurrence: 7.3%Cost to repair: $250Symptoms:
Poor engine performance, reduced fuel efficiency
6. Faulty EGR (Exhaust Gas Recirculation) Valve
Occurrence: 11.1%Cost to repair: $550Symptoms:
Check Engine Light on, EGR valve warning light on
7. Transmission Issues
Occurrence: 6.7%Cost to repair: $900Symptoms:
Transmission slipping, unusual noises from transmission
8. Faulty Air Mass Sensor (AMS)
Occurrence: 5.9%Cost to repair: $300Symptoms:
Poor engine performance, reduced fuel efficiency
9. Catalytic Converter Failure
Occurrence: 14.1%Cost to repair: $1100Symptoms:
Check Engine Light on, unusual noises from exhaust system
10. Faulty O2 Sensor (Lambda Sensor)
Occurrence: 10.5%Cost to repair: $400Symptoms:
Poor engine performance, reduced fuel efficiency
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