Jump to content

  • 0
Sign in to follow this  

Throttle Position Sensor problems


I have a 2001 GMC Sierra 1500 4.8L


I have had the same issue multiple times now. If I let the truck idle


for any length of time, especially when the weather hot, it goes into


"Reduced Engine Power" mode and I can do nothing but limp to the side of


the road. I have taken it to my local mechanic (who I've used for over


20 years) and each time it throws a TPS failure code. My mechanic is at


a loss as he's never seen this happen before and it has happened 4 or 5


times to me. The TPS has been replaced each time.


Any ideas?

Share this post

Link to post
Share on other sites

2 answers to this question

Recommended Posts

  • 0

Check the Neg. battery cable to make sure it is tight(at the battery and at the engine) . Also check all your ground wires on the engine to make sure they are tight.

Edited by Duelin

Share this post

Link to post
Share on other sites
  • 0

that message means there is a code in the ECM ,,,,


it needs to scanned by a competent tech .....not the guy you have ,he is out of the loop as far as technology goes and service information,


get a different corner garage tech or take it to a dealer for a diagnoses and stop throwing TPS's at it


again,you guys have to read the owners manual !!!!

Share this post

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

Sign in to follow this  

  • Popular Now


Important Information

By using this site, you agree to our Terms of Use.