Question about GMC Yukon

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I have a 2007 GMC YUKON, my check engine light is on, and i am getting a code P0121. How can i clear up this issue?

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Have TPS Sensor tested & throttle checked for binding

Posted on Mar 21, 2011

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See what the code is and have it fixed

Posted on Mar 21, 2011

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1 Answer

Throttle position sensor


That sensor has to be back probed & tested,
preferably with an oscilloscope & it may be just
be doing it's job & is okey & you have other
issues such as wiring

Mar 06, 2013 | 2007 GMC Yukon XL Denali

1 Answer

My 2007 Yukon Denali has 86000mi on it. I shut it off and turned it back on 10mins later to see Service Traction Control, and Service Stabiltrak scrolling across the info screen. The truck runs poorly...


Ok just so you know that service traction control and stabiltrak well come on if there is any check engine light on and if it's running poorly then i have to guess that there is also a check engine light on!! Once there any repairs are done then you would have to clear out the codes in the ECM, traction and suspension in that order!! GOOD LUCK !

May 23, 2011 | 2007 GMC Yukon

1 Answer

How to reset the engine light on a 2007 yukon denali gmc


The check engine light is reset with the scanner. You can also try disconnecting the battery for about 1/2 hour and then connecting it again. If there is a fault code the light will come on again.

Jan 14, 2011 | 2007 GMC Yukon Denali

1 Answer

How do i turn off a check engine light on my 2007 gmc yukon


The dealer will have to do this for you. If you had a problem and it is fixed, the light will go out after several days of use, if the light doesn't go out after a while, then you still have a problem and the dealer will have to help you read the codes and come up with a solution. Most of the time a check engine light will be set off by faulty emmission sensors, or some type of failure in the emmision controls.

Nov 17, 2010 | 2007 GMC Yukon

2 Answers

Check engine light is on sametimes and I check out and I have a code P0121 also I still under garanty but I dont not if i can be coverage in this matter


A code starting with P is powertrain related so most likely you can get warranty repair.I would call the dealer first and talk about options with them to determine warranty guidelines first.
Good luck!Greg

Aug 12, 2010 | 2007 GMC Yukon

1 Answer

Where is the pedal sensor for a gmc yukon 2007 located p 0121 code


P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance Problem
that is a drive by wire system the gas pedal has a sensor rigt above it make sure the plug is all the way in or the sensor could have a glicth in it and would have to be replaced

Mar 24, 2010 | 2007 GMC Yukon

1 Answer

How do you reset the check engine light on a 2003 gmc yukon xl


the check engine light means you have a trouble code in your vehicles computer. After fixing the problem with the yukon the check engine light can be reset sometimes by disconnecting the battery and disconnecting the ECM fuse. Although some parts stores are known to check your codes for free they might also clear them with a scan tool.

Feb 26, 2010 | 2003 GMC Yukon XL

1 Answer

I have a check engine light on dash on how do i turn it off , the rig is a 2005 gmc yukon


you can disconnect the battery and hopefully it isnt a hard code that comes right back or go somewhere to have it scanned for the code information and cleared so you can correct the issue

Oct 29, 2009 | 2005 GMC Yukon

1 Answer

2007 GMC Yukon codes P0121, P2544, U0101


P0121 Is a throttle/pedal position sensor/switch "A" circuit range/performance problem. P2544 torque management request input signal "A". U0101 lost communication with transmission control module. I hope these definitions help.

Aug 26, 2009 | 2007 GMC Yukon

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