what this code means p0121

Asked by Mar 23, 2016 at 11:33 PM about the 2007 GMC Yukon Denali AWD

Question type: Maintenance & Repair

I would like to know what this code means

2 Answers

96,955

Throttle position sensor or circuit, first thing is check the connector, make sure it is clean and the pins are secure, if that looks good then a live data scanner can see if there is a problem with the sensor itself.

72,235

po121 has to do with the TPS as tennisshoes says above. Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sensor. This sensor controls engine operation such as fuel cut. On the other hand, the Wide open and closed throttle position switch, which is built into the throttle position sensor unit, is not used for engine control.

Your Answer

Add photo

Related Questions

Search GMC Yukon Questions

GMC Yukon Experts

#1 clayduster71
clayduster71
Reputation 2,430
#2 David Boccabello
David Boccabello
Reputation 730
#3 Danielle Heller
Danielle Heller
Reputation 540
View All

Related Models For Sale

Used Chevrolet Tahoe
583 Great Deals out of 32,917 listings starting at $1,500
Used GMC Yukon XL
225 Great Deals out of 12,591 listings starting at $1,495
Used Cadillac Escalade
202 Great Deals out of 10,929 listings starting at $2,500
Used Chevrolet Suburban
280 Great Deals out of 19,274 listings starting at $1,999
Used GMC Sierra 1500
769 Great Deals out of 68,508 listings starting at $1,800
Used Ford Expedition
404 Great Deals out of 23,948 listings starting at $1,500
Used GMC Acadia
577 Great Deals out of 44,891 listings starting at $3,500
Used Chevrolet Silverado 1500
1,916 Great Deals out of 182,761 listings starting at $1,495
Used Ford F-150
2,126 Great Deals out of 193,347 listings starting at $290
Used Ford Explorer
889 Great Deals out of 64,215 listings starting at $799
Used Jeep Grand Cherokee
1,074 Great Deals out of 73,188 listings starting at $1,200
Used Dodge Durango
264 Great Deals out of 21,138 listings starting at $1,500
Used Toyota Sequoia
116 Great Deals out of 5,333 listings starting at $2,500
Used Toyota 4Runner
227 Great Deals out of 19,353 listings starting at $1,500
Used Lincoln Navigator
81 Great Deals out of 5,632 listings starting at $1,900

Used Cars For Sale

2014 GMC Yukon Denali AWD For Sale
10 Great Deals out of 162 listings starting at $27,950

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.