2004 Grand Prix GTP P0300 Code after overheating

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carriedi
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Re: 2004 Grand Prix GTP P0300 Code after overheating

Unread post by carriedi » Mon Jul 13, 2015 11:09 pm

normal operation of the fans is to not come on until the temp reaches 220+ then turn off at around 200-210. So, about 3/4 is when the fan should come on. (by most gauges)

overheat at highway speeds and not at lower speeds is a sign of low circulation or not enough coolant. You don't have enough coolant passing through the radiator to cool down the engine. Air pocket, clog somewhere, water pump not pumping enough coolant, radiator not able to transfer enough heat away from the motor, head gasket pushing coolant out of the engine...
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dustin04gtp

Re: 2004 Grand Prix GTP P0300 Code after overheating

Unread post by dustin04gtp » Wed Sep 21, 2016 8:46 am

Any information on the Overheat Protection Code? How does it work and where can I find actually manufacturing data that proves this. Thanks

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