Question about 2000 Pontiac Grand Prix
My engine service light is on and when the car gets to tempeture my idle stays in between 1500 and 2000 rpm
Most common thing for this is either a failed coolant temp sensor that is not telling the computer that the car is warmed up and it is still running at cold Idle speed adn the code will tell you that.
Or a vacuum leak and the computer is trying to make up for the leak my making changes to the fuel deliery to keep the engine running .
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The only way to find out what code is stored in the computer and what turned the check engine light on is with an OBDII scan tool and also the only way to turn off the light but just turning off gthe light does not fix the problem, as soon as the computer does it checks again and you have completed the predetermined dive cycles the light will return so the only way to keep the light off is to properly repair the reason it was commanded on in the first place!
Posted on Aug 23, 2008
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Posted on Jan 02, 2017
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