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Pontiac Grand Prix Problems

Erratic temperature gauge and warning light on Pontiac Grand Prix

Problem Description and Possible Solution

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.

(7 people reported this problem)

Pontiac Grand Prix Vehicles With This Problem

RepairPal Verified
Average mileage: 100,000 (100,000–100,000)
Electrical & Lights affected: 3.1L V6
4 model years affected: 1990, 1991, 1992, 1993
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