Car Problem Reports

Audi TT Check Engine Light Due to Vacuum Leaks, Oxygen Sensor, or Catalytic Converter Fault

Audi TT Problem
14 Reports
Me Too

Model Years Affected: 2000, 2001, 2002, 2003, 2004, 2005, 2006

Exhaust & Emissions Affected: 1.8L 4 Cylinder Turbo

Average Mileage: 72,140 mi (31,000 mi - 127,250 mi)


Vacuum leaks, oxygen sensor failure, and catalytic converter efficiency faults can cause the Check Engine Light to illuminate.

  • , , 50,300 mi

    eplaced the oxygen sensor and the light came back on. The mechanic now says that it is a computer failure

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  • , , 31,000 mi

    Engine check light on. Audi review noted oxygen sensor, another auto repair mentioned it may be some else which caused this to happen. Review turned up nothing. I now want an dedicated audi TT repair location other than the dealer to check problem. Any suggestions.

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  • , , 34,100 mi

    engine lite came on and the headlights went dim...

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  • , , 94,330 mi

    chick engine light came om ran car over to ato dealer and found banks 2 catas to at faults

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  • , , 108,000 mi

    CEL on, replaced MAF CEL back on two days later! Common in German cars, same problem with Mercedes SLK 230 Kompressor. Never resolved after multiple repairs.

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  • , , 60,000 mi

    Chk Engine Light--had faults for catalyst and coolant system performance. Quoted repair $500 for thermostat replacement.

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