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Q: Blue Thermostat light sensor on 1998 Volkswagen Beetle

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
My thermometer light turned from red to blue and car quit in driveway and will not start back. This is the diesel car.

Any suggestion? Will turn over but not start.
(1) Answer
Really need to Check the Engine Computer for codes. The Blue light means that the Engine is cold and so the Diesel Engine Turbo Charger is held back until the Engine Heats up completely. The Red light means there is a fault condition.

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