Audi S4 Problem Report

Audi S4 Check Engine Light and/or Engine Overheating Due to Failed Thermostat

(11 reports)

The thermostat may erratically stick open or closed. The can result in illumination of the Check Engine Light and/or engine overheating.

Car indicated that it was overheating and to stop the engine. Took to dealership under warranty and they've indicated that it was a problem with the thermostat. -
Overheating, warning to shut car off due to low coolant. My coolant is fine and fans are too. Thermostat is the culprit. -
Front fans come on full blast, AC shuts off. Temp gauge climbs up. -
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