Maintain fuel quality to avoid misfires and CEL illumination on Audi A6 Quattro

Fuel quality must be maintained to avoid engine misfire problems; the misfires may cause the Check Engine Light to illuminate.

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Average mileage: (–)
Engine affected: 3.0L V6
3 model years affected: 2002, 2003, 2004
3 people reported this problem
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