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If yours is on, it could be many many things...but I recently had mine come on because the thermostat was out/going out of it. I took it to my local auto-zone, they will do a free scan and give you a good idea of where the problem lies.
Like I said, my 2004 envoy's check engine light was on because of the thermostat, after driving it for 10 or 15 minutes (enough to get it warmed up) the temperature gauge would only reach about 180. After having the thermostat replaced it now gets to 210 degrees-where it should be.
Hope this helps
What else can I help you with?
How do you get the check engine light codes on a 2004 GMC envoy?
With an OBD2 scan tool.
Why would the check engine light come on with a 2004 GMC envoy?
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
How do you reset the service engine soon light on a 2004 gmc envoy?
To reset the service engine soon light on a 2004 GMC Envoy you can remove the ECU fuse. ECU stands for electronic control unit.
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Get a code reader from Autozone or a friend and plug it into the OBDII connection to read what code caused the check engine light to illuminate. A flashing check engine light indicates to NOT drive any further.
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The check engine light in a 2004 Toyota Tacoma can come on for many reasons. It could indicate an exhaust leak or a problem with the engine.
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Here a answer maybe CHECK THE ENGINE:) the light will go off
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A flashing check engine light is an indication of a misfire.
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Reset the Check Engine Light by disconnecting the battery for about 10 minutes.
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The check engine light has nothing to do with an oil change. The check engine light is reset with a scan tool after repairing the failure that caused it.
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No such thing.
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It is a little yellow engine.
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might need to check your engine soon
