Your vehicle has electronic throttle control , position sensors in the accelerator pedal ,position sensors in the throttle body . A REDUCED POWER message is suppose to warn the drive so it takes it to a quaified repair shop ,DEALER !
Cleaned MAF & throttle body & changed crank position sensor.
Not just replace parts blindly .
Electronic Throttle Control System Diagnosis Diagnostic Quick Tips Snap on...
Electronic Throttle Control This video shows Toyota , your's works the same .
Over time these position sensors wear .
SOURCE: Reduced power code comes up and my truck stalls.
I had the same problem, and the solution was cleaning the throttle body, it does need to be completely removed to be cleaned thoroughly. I just used some brake cleaner on a rag to clean off all the carbon deposits. A friend of mine who is a dealer tech had only seen this trouble code once, and this was the solution. So far, my light has not come back on and the truck is running alot better at idle.
SOURCE: Chevy truck '02 surges between 45 and 55 mph
you should change the tps( throtal position sensor) this can cause that problem
SOURCE: how do i change out the knock sensor on a 2006 chevy colorado
You didn't list your engine size so please pick the applicable to your motor size:
Removal & Installation
2.8L & 2.9L Engines
To Remove:
Knock sensor (KS) (A), Engine harness (B), Knock sensor (KS) connector (C)
To Install:
SOURCE: 5.3 chevy hesitates when cold runs fine after warming up
I have same problem, Chevy told me it was probably a seal affecting fuel air ratio and when warm seal expanded to stop air leak. I forget which seal but they also said to check plastic case around seal because it will warp and may also need to be replaced. It was located near top center of engine. Please let me know if you figure it out.
SOURCE: CHEVY AVEO 2006 ERROR CODE P2135.
should not have to pay for same part twice.take vechicle back to dealership tell them car not fixed you have same problem.let them know you payed them to fix car.same problem still exist.code p2135 problem could be the tps sensor or signal circuit to sensor wires and connector have a short or problem could be throttle body assembly damaged.
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