Throttle Position Sensor problem

[arreis1002]

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?

 

[happy 2011]

well two things
Frist i would say it safe to say it's not the tps
2nd get a mechanic that will diag it not just replace the part that the code is for.

There are many reasons it will throw a tps code. there are about 50 diffent tps codes so what code is your tk showing?