Thread: P1629 and P1673

Originally Posted by fomas

So how do you fix the p1673 code need help I have this code 99 grand prix gt

When you cycle the key, does the "Engine Hot" or "Overheat" (or whatever the warning light for over temp says) light up during the bulb check?

Originally Posted by fomas

No everything seems fine runs at the right temp 180 thermostat installed.
there is no over heat warning light just the gauge.

I think we're talking past each other. I just did some reading on the Google. *IF* I'm understanding the code set criteria correctly, the code has nothing to do with the actual engine temperature.

It is there to warn you that your "Idiot light" in the instrument cluster is malfunctioning. I assume they have a code just for this because nobody pays attention to the actual temp gauge.

This is why I asked very specifically if the warning light illuminates during the "bulb check" when you start the car.

I dont think there is a warning light for over heating. There is a low coolant light check engine light but no over heating light. As far as I can tell they all work none
are unlimited .
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