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2004 pontiac grand prix

Nick k
in Pontiac General Discussion/Questions

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I have a 2004 Pontia Grand Prix 3800. I just bought it and the check engine light was on, so when I scanned the code it was a temperature sensor. The I realized the temp sensor was unplugged. I replaced the sensor and plugged the sensor in and now the car wont run over 1700 runs. If I unplug the sensor the car runs fine but check engine light comes on

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