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1989 964 C4 Interlock warning REVISED

Transmission and Clutch

Vehicle Information: Model: 964 C4; Year: 1989; Body Type: Coupe; Total Mileage: 90000;

Traction control system interlock warning occasionally (usually with driving 15 minutes, if at all and straight constant speed driving).This one has been chased by a pro mechanic using a Bosch Hammer to read fault codes, and wasnt able to find anything wrong.I am an electrical engineer and this type of problem is usally caused by eithor an intermittent sensor or by noise.

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