2007 Chevy Avalanche high idle

PECOSO1

MEMBER
2007 CHEVROLET AVALANCHE
V8
2WD
AUTOMATIC
66,000 MILES

I have a chevy avalanche, just to have the check engine light on with a p0121 which is for the tps, I went to the dealership to ask for the part an they suggest me to clean the tps with a rag a tps liquid which a did, the code is not there any more but ny car is in a high idle, what you recommend to do.

8 Replies

LEGITIMATE007

MECHANIC
5,121 POSTS

I'm pretty sure you put it back on wrong. When you took it off, was there a kind of tension on it? It will need to be put back on exactly the way it came off, with the same amount of tension.

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Wednesday, March 24th, 2010 AT 4:31 PM

PECOSO1

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4 POSTS

I didn't took the tps apart. I've cleaned that in place, that's why I don't know what happened.

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Thursday, March 25th, 2010 AT 1:36 PM

LEGITIMATE007

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I dont even see a throttle position sensor for this vehicle in my diagrams. And only have one engine size, what size engine is this, and where was the item(tps) that you cleaned?

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Thursday, March 25th, 2010 AT 1:50 PM

PECOSO1

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4 POSTS

Here is the part I've cleaned

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Thursday, March 25th, 2010 AT 7:22 PM

LEGITIMATE007

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I think your throttle plate is stuck slightly ajar. Take that tube off in the picture and clean around in there with throttlebody cleaner, and work the throttle plate back and forth, you may need to spray a little wd 40 on the linkage, and just work it until it loosens up and goes back to normal

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Thursday, March 25th, 2010 AT 8:26 PM