Question about 2002 GMC Yukon Denali
You can go to any major auto parts store and barrow their OBDII Scan tool.
And all you do is shut all electronics off in vehicle like stereo heater etc.. then you insert your key in the ignition turn forward (not starting it ) Then on the driver side under the dash there should be a USB Connector and you will plug in the cord to that adapter and the device will start to scan the codes. After that it will tell you on the screen what the codes are and what problem it found so you will write it down codes and problem then just hit the erase button and this will re set your engine light. Then just unplug the USB Cable and shut your ignition off.
After all of this your light should stay off up to 50 miles if it comes back on then you have a problem like a bad O2 sensor most cars have three of them and the other problem would be is a MAF Sensor on your air intake. These are the most common problems to set the engine light off.
Posted on Feb 07, 2010
The only way to turn it off is to fix the reason that is causing it to come on. Have it scanned by a repair shop, they can diagnose it and tell you what it needs.
Posted on Feb 07, 2010
The other way you can solve this problem is to disconnect and remove the POSITIVE cable on the battery wait 30 seconds before reconnecting the cable this will reset the computer but as stated earlier if it comes back on after 50 miles get it checked at the dealer.. I have a Ford with the same problem and it has cost me $50 every 3 months to have it reset seems it does it whether there is a problem or not so far to date I have had it set 6 times no problems found..so now I do it on my own..
Posted on Feb 27, 2010
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Posted on Jan 02, 2017
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