Question about 2003 GMC Envoy
Try opening and then closing the gas cap. This sometimes resets the sensor in the tank.
Posted on Apr 25, 2009
Your check engine light is to notify you of an emission problem. your local autoparts dealer will most often check your code for free.
Posted on Apr 15, 2009
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Posted on Jan 02, 2017
That code represents a lower than expected reading for temperature (coolant). First thing to do is check your coolant level, as if it is low, then the sensor can not read correctly. Second, you may have a thermostat that is stuck open, allowing the coolant to cool off too much. The sensor should be mounted on top of the engine, near the thermostat housing.
Posted on May 18, 2008
4.2L Engine the thermostat and the neck where the hose goes on is one unit $25 at autozone
Posted on Dec 29, 2008
440 is Evaporative emission control system malfunction. Could be as simple as cleaning your gas cap & filler well & making sure gas cap is on tight, as that is the most common cause, otherwise you may need to check for vacuum leaks or purge solenoid has failed, or canister may be plugged.
495 is telling you that your engine/rad cooling fan, is malfunctioning as well, which I suspect is causing that noise your hearing. Have it looked at a.s.a.p. as it can do some real $$$ damage if it flies apart.
Have codes erased after fixing fan & making sure cap is tight, then see if 440 comes back, if it does, you may need to do more investigation.
Posted on Sep 03, 2009
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I have a service engine soon light and the code that appeared when check is 1481, do you know what this means?
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