Question about 2000 Pontiac Grand Prix
If they did not give you a trouble code than find someplace that will. It is really uncommon to have knock sensors go bad. It is more common for a mechanical failure to cause the knock sensor to become more active than it should causing the knock sensor code.
Does the engine make any noise when it is running?
The best thing you could do is find out specifically what the code is that is causing the check engine light to come on. Then research that code for a solution.
BTW, we get a lot of cars in our shop that have been to autoszone and have had no resolution to there problem. I agree with emission wiz, it takes years of experience under the hood to be good at figuring this stuff out. You can't hand a guy a scan tool and expect him to solve problems. That guy with the scan tool at autozone more than likely, barely has more automotive experience than you do kgirman! :)
Posted on Sep 27, 2010
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Posted on Jan 02, 2017
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The service engine soon/check engine (yellow light) comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system you will seldom feel the car engine run any different, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.
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