Question about 2003 GMC Envoy

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How do i reset the check engine light on my 2003 envoy?

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TAKE AND DISCONNECT BOTH BATTERY CABLES FROM THE BATTERY AND PUT THEM TOGETHER FOR TEN MINUTES HOLD THEM TOGETHER OR USE A JUMPER WIRE

Posted on Oct 13, 2010

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Posted on Jan 02, 2017

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SOURCE: engine cooling fan runs all of the time

the fan relay is bad

Posted on Mar 06, 2009

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SOURCE: check engine light on - 2003 gmc envoy XL

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

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SOURCE: engine reset light on 2003 gmc envoy

The service engine light you refer to is telling you you have a problem with the computerrized engine control of the car.When the light comes the computer stores a numerical code that can be retrieved with a scan tool or code reader.If you are not experienced with diagnostics you need to take the car to a mechanic,because sometimes a code can fool you and you can change a good part.An example of this would be reading a code that the oxygen sensor is reading a lean condition setting the light on. but the real issue is a bad fuel pump not supplying enough fuel to the engine. On the code alone you would be inclined to change the sensor when it was not the problem.

Posted on Nov 26, 2008

tewantinbudg
  • 3 Answers

SOURCE: reset the check engine light

try swiching it off and check that it comes on when you swith the ignition on.Start the car ,and if it stays on it could mean that there is something wrong with one of the engine sensors,so check all the connections.

Posted on Mar 24, 2009

  • 7353 Answers

SOURCE: How to reset Service Engine light?

Its not silly.180f degrees is not hot enough, The engine needs to run at 195f, plus the heater isnt going to work very good either. If you want the light out, replace the thermostat. I would advise you to find a repair shop to do it for you. Its not easy.

Posted on Nov 23, 2009

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1 Answer

I just bought a 2003 Envoy It had the check engine light on. It showed on the the scanner a code for the Crankshaft Sensor and said something about advanced timing. So i've had the crankshaft sen


Why would you be at a dealer with a 10 year old vehicle

Have extra money to throw away

How about a local repair shop

How is it you had work done & still
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What is best running temp for 2003 envoy


The engine operating temperature should be between 200 to 210 degrees, if it is running below that, the engine will not perform at its peak and the check engine light might be set.

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The person running the test is an idiot. The OBDII test instrument is not capable of determining if there is a warning lamp failure. It is probably guessing based on voltage level, but lamp resistance does normally vary. The test is supposed to be done visually. Take it to someone else, and they will probably be more competent and pass your car.

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My GMC 2003 Envoy failed smog test because of "the


Hello
Does the light ever come on while you are driving the vehicle? It is possible that the vehicle does not trigger the code on the key cycle when vehicle is connected to the OBDII scan tool (a cycle is the time from when a vehicle is started to the time the vehicle is turned off) you should however most of the time be able to check a vehicles trouble code history to see what may be turning the light on
Good luck
Chris

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1 Answer

Have a 2003 envoy check engine light comes off


Could be oxygen sensor in exhaust, if it gets a little too much rich exhaust it will come on intermittenly and go off when it dries out

Jul 23, 2010 | 2003 GMC Envoy

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How to reset Service Engine light? 2003 Envoy ... Autozone says engine temp too low was reason for light. That's silly. I have gages ... it runs at 180 degrees. I just want the light off.


Ok replace the thermostat which is stucked open, cuz the computer will not go into open loop unless the engine reaches normal operating temperature. You can disconnect the battery, to reset it, but untill you replace the thermostat, the check engine light will pop up again. Good luck

Nov 23, 2009 | 2002 GMC Envoy

2 Answers

CHECK ENGINE LIGHT IS ON 2002 GMC ENVOY


your check engine light is to notify you of an emission problem. your local autoparts dealer will most often check your code for free.

Apr 15, 2009 | 2003 GMC Envoy

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