Question about GMC Yukon
I just have had the radiator replaced. I have let the car heat up multiple times and have taken off the reservoir cap. I have also tried to run the car for 20 min without the cap. The car continues to run cold (around 165) and causes the service engine soon light to come on. I have driven the car almost 200 miles since the radiator has been replaced. 2001 yukon denali
Shouldn't really be a big problem if it's running a bit cold, can you reset the sensor via the diagnostic obd plug, this may stop the warning light coming on
Posted on Mar 24, 2014
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Posted on Jan 02, 2017
Did u put in fuel shortly before the light came on? I own 2 service centers & the most common situation with "Check Engine" lights are because the fuel cap wasn't re-installed or not tightened. When you refuel make sure it "clicks" when putting back on. We don't charge for a "Code Reading" but a dealer will, don't go there. Go, like the others suggested. If it is the fuel cap & you re-install it correctly, the light will go off after a short drive. Good Luck. PS-Don't panic when the "Check Engine" light comes on unless it blinks, if that happens don't drive. PSS-RE: Murray's, Auto-Zone.......If it's a "Code" (the reader will give a #) the code book will tell you the problem. PSSS-Some1 please have Troy W's Mommy & Daddy take away his keyboard. Just because you can put together a "Lego" car doesn't make you a master mechanic. You only repeated what we said except you have a "Napoleon" complex against any1 plugging something in to a vehicle. It's the same as plugging in a light @ home. In conjunction with "kinder" nine out of ten time in my experience it usually is the oxygen sensor(s) which would be about right with the year model
Posted on May 18, 2008
PO172 means that an oxygen sensor in bank 1 detected a rich condition (too little oxygen in the exhaust). I would replace the thermostat first. The computer could be injecting too much fuel because it thinks it never gets to operating temperature. That may keep the light off.
Posted on Jan 28, 2009
SOURCE: service engine light staying on
Hello tdamm...No...the service engine soon (SES) light on your yukon is not telling you to change the oil.
This is a warning light that is illuminated when there is a problem affecting the Emission system and the engines computer management (ECM) has detected it from a fault. It could be something as simple as a loose or defective gas cap. If the SES light is blinking, it's more serious....
The yukon needs to be connected to diagnostic equipment (scanner) for fault diagnosis.
You can go to autozone they will hook up an OBD II scanner to your vehicle and explain the codes to you.
Good luck...i hope this helps and will fixya up.
Posted on May 25, 2009
Look for a loose connection to the temperature sender unit on the motor.
If all connections OK, you may need a new temp sender unit.
Posted on Jul 28, 2009
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