Reduced Engine Power

[nelly5813]

Hello everyone, just spent a boat load trying to fix my Tahoe and still getting these codes and the dreaded "Reduced Engine Power" notification. I had the throttle body replaced and a new wire harness to the throttle positioning sensor. What is most baffling in my situation is I have narrowed the failure to 2 conditions, the first is at initial startup, it will intermittently go straight into reduced engine power before I ever put the truck into gear. The second condition is when I am driving at 60 mph or better and then set the cruise control, instantly the truck seems to run rough, and with in a minute or two it will give the reduced engine power notification. What could be causing this, My mechanic is going to be checking the ground on the back on of the engine, also thought we may need to address the pedal position sensor and/or the TAC. If someone has any insight on what to do next I would appreciate the input. Thanks.

 

Jeff Nelson

[00Silverado4x4]

I'd start with double checking your fuel pressure. You may have a fuel delivery problem.

[rjgti]

http://easyautodiagnostics.com/gm/4.8L-5.3L-6.0L/electronic-throttle-body-1

 

this could help you out