reduced engine power
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Reduced Engine Power - on startup only
2003 Yukon, 245k miles, 5.3L 2wd -- I started getting the Reduced Engine Power warning a few years ago not long after I bought this truck used from the 1 previous owner. For a year, I occasionally got the REP warning, maybe once every month or so. Then, it seemed to completely go away this...- dukbludvl
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- reduced engine power rep starter throttle position sensor
- Replies: 3
- Forum: Engine & Drivetrain
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Loss of Horse-power with no codes
I have a 2015 Yukon Denali with the 6.2 and the car seems to drive normal, however whenever the accelerator is really pushed at all its as if nothing happens at all. It is as if there is almost no horsepower. The engine does rev up high but slowly and seems to shift normally. I have an OB2 and...- p1zaul
- Thread
- horespower low power power loss reduced engine power sluggish
- Replies: 18
- Forum: Engine & Drivetrain
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Reduced Engine power, Service Stability System
Hello all, I'm new to the group as I purchased a 6.0 2006 Yukon Denali from my dad with a little over 240K on the clock. Don't let the mileage fool you though, this truck as been extremely maintained its entire life and looks as good as if it just came off the show room floor with a couple of...- Gstepha0
- Thread
- denali electrical fuel injector wiring harness help reduced engine power service stability system yukon
- Replies: 13
- Forum: Engine & Drivetrain
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still getting the P0220…
Hey everybody, last year I had a lot of trouble getting the reduced engine power message. I think it was the P2135 code. I replaced the throttle body, added a few grounds (neg battery pole to TCM to body to throttle body to engine to PCM), cleaned all thenother grounds on the truck and got the...- clemenshess97
- Thread
- p0220 reduced engine power
- Replies: 9
- Forum: Engine & Drivetrain
