Question about 2002 Pontiac Grand Am

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I have a 2002 Grand Am GT, Ram Air V6. Last year the check engine light came on that indicated the engine temp was too LOW. So I replaced the thermostat and temp sensor. Now the engine light has came on again, with the same error code. What can it be besides the thermostat???

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  • Pontiac Master
  • 8,273 Answers

Thermostat is the only thing that can cause this fault. Check the thermostat again. Just take it out and see if it's open. If not, maybe you need to reflash your computer. The reference temperature or sensor calibration it is using may be corrupted. If you have more questions, please let me know.

Posted on Oct 08, 2010

  • qwlong Oct 08, 2010

    By reflash, do you mean to just have someone clear out the code?

  • Jeff Turcotte
    Jeff Turcotte Oct 08, 2010

    no, I mean the dealer would have to reinstall the software in the computer. That can be expensive, so check the thermostat first before doing that.

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