Question about 2001 Pontiac Grand Prix

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Need help with a Grand Prix

I have a 2001 Grand Prix and the code for the Anti-freeze came up on the scanner. I filled it up to the proper level but the light is still on, also I had a key made at Auto-Zone and when I use it the car cuts off,(like when the fuel pumps is going bad), but when I use the original key it stays running.. Any suggestions??

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  • xnypdblu Nov 17, 2008

    Thanks,,, No I don't see a wire embedded on the key,, no do I see one on the original key.. And when I change the sensor will the light go out by it self??



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The new key must be programmed, did the key you have made have a little silver wire embedded in it? if not it will not work, you are right about the fuel pump, the anti-theft is being triggered by the new key. As far as the coolant light goes I would change the sensor, they are prone to failure and then the light stays on, the level sensor is in the coolant tank or at the top of the radiator tank, small and round with wire going to it.

Posted on Nov 17, 2008

  • Marvin
    Marvin Nov 18, 2008

    Check with the dealer, not sure your system uses the embedded wire resitor, but best thing to do is look in the owners manual, you have a security light flashing correct? do you have the old key? And yes the light will go off by itself if the fault goes away



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1. Make sure the car is cold. Remove the radiator cap (press & turn about 1/4 turn to remove pressure in the system) Once the pressure is bled off you can remove cap and leave it rest on the filler opening.

2. Find the petcock on the radiator (the little valve attached to the radiator. You have to open/turn clockwise to drain the anti-freeze. Drain anti freeze below thermostat housing. About 1/2 to 1 gallon.

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