Erratic temperature gauge and warning light on Pontiac Grand Prix

The engine temperature sensor wire for the engine temperature gauge, or warning light, may touch the rear exhaust manifold causing a short to ground causing erratic operation of the temperature gauge or warning light.

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Average mileage: 100,000 (100,000–100,000)
Electrical & Lights affected: 3.1L V6
4 model years affected: 1990, 1991, 1992, 1993
6 people reported this problem
0 people shared problem details
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