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SUVs GMC Yukon Yukon "Reduced Engine Power message"
74 messages, Last post on Oct 12, 2009 at 9:54 PM
You are in the GMC Yukon Forum. Your Hosts are steve_ & tidester
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Replying to: wendygee (Jul 07, 2009 5:02 am) As far as the Knock Sensor and other codes may be triggered by the pedal sensor, so zoom in on the pedal sensor first. |
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| I have a 2000 yukon xl. I was driving it today and put my foot on the gas to give it some power and it did nothing. All of sudden my oil guage dropped from 40 to 0 and the car just died. I tried to start it again and it started and then shut off. I just replaced the transmission,water pump. Does anyone have any ideas what could be wrong with it??????? some one told me the fuel pump,sensor and then the most expensive the computer...please help | |
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i own a 2003 silverado 1500hd crew cab, 6.0 automatic. i fought the reduced engine powre thing for almost a year, kept throwing the code of bad tpp, replaced it to no avail, tuned it up to no avail, new wiring harness from tpp (on pedal) to tac module to no avail, new throttle body and wiring harness to no avail........at this point i had spent almost $2000.00 and it was still running like crap, took it to the dealer for reprogramming and another throttle body (free of charge after i blew up in the mechanics face) and it ran fine for 2 days and i took it back again in may 2009 and the mechanic was gone when i went to pick up the truck, i asked the guy at the counter what he did this time and he said that the head mechanic had done "something" with the tpp but he was'nt sure what. the truck ran like a top all summer with trips to the mountains towing my camper, runnung all over the place looking for parts for my restoration projects and daily trips to work. around the middle of september the temperature started dropping into 40's and 50's at night and guess what?, that good ol reduced engine power light came on again. the mechanic that worked on the truck and "fixed" it cannot be found because the dealership has since closed down. so , does temperature affect whatever is happening? (the same tpp code is being sent) can i only drive this truck inthe summertime? my truck has 76,000 miles on it now and it is useless to me if i cannot safely drive it. i have owned,driven, and worked on chevy cars and trucks for the last 20 years and this new generation of wireless throttles have convinced me to never own another one.  i think i'm gonna go buy a toyota............................ p.s. i had a little luck with mine if the light would'nt go away after 4 or 5 starts by unhooking the positive battery terminal for 5 mins or so , this usually gives me 6 or 7 trouble free starts before i have to do it again. good luck and if anybody else has this problem and it seems temperature related like mine, please let me know how you finally fix it.
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Replying to: bandit79mpr (Oct 07, 2009 5:26 pm) P0120, P0122, P0220, P0222, P2135.......
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Replying to: rsht (Oct 08, 2009 4:26 am) |
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Replying to: bandit79mpr (Oct 07, 2009 5:26 pm)  post 22 of this forum. I apologize if the picture didnt work before, my photobucket account went inactive for a while since I did not log in. I still to this day do not have any problems with my truck after I replace the harness end. You did say you replaced a lot of wires but in the picture is the one I replaced. Have someone wiggle the wires when it is not in Reduced Engine Power Mode. It may save you a lot of time and money.
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