Chevy gmc 4.8 5.3 6.0 reduced engine power p0220 p2135

This video is how fixed the reduced engine condition in my 2005 suburban 2500 6.0. The problem had come back but it was my fault. I did not push the clip on the throttle body on all the way. I pushed it all the way on til it clicked. Have not had the problem in months when it would happen daily. Good luck
Update: was replacing water pump on truck the other day and I could see leaves under the fuse box from the side. I removed cover and lifted fuse block and there was a mouse nest inside. It had chewed some wires. Not all the way through. Not causing my issue but concerning. the symptom had come back some time ago. I went back under the hood and wiggled throttle wire harness and truck went into reduced engine power. I checked the connectors where I spliced in new harness and a wire had come out. I soldered all the wires this time. I have not had the issue again. When replacing wireharness always use solder.

[andypandy]

Just bought a nice ass Tahoe for junk price with new tps, app and a bunch of other new parts on it. The folks couldn’t get it to come out of reduced power mode. There were some chewed up wires. Fixed those wires but no luck. Still in limp mode. My scan tool read 19v on the tps. Spec is like 1-14. It was the black wire going to the back of the engine. I couldn’t get on the bolt so I cut it and spliced into a good ground spot. Zero issues now. Good luck y’all.

[antoniotorres]

Got 2004 tahoe with same problem change all sensors and nothing mine drops below 500 rpm at stops when accelerate got no problems only at stops thinking changing fuel pump with filter n regulator all inside tank.

[antonioflores]

I have the exact same problem, but the crazy thing is my pedal freaking out now too. Like sometimes it'll send a signal that im giving it gas when my foot is on the ground or i have terrible throttle response. I know it has to be a sensor problem because i keep getting those tps sensor codes but everything checks out when i check my voltages and its driving me crazy. (Its an intermittent problem) sometimes my truck will even stall out in the middle of driving

[lifeafterlife]

P0220 and P2135 indicate a problem with the TPS voltage. Check TPS voltage at closed throttle. (should be .45 volts) Check again at wide open throttle. (should be 5 volts.) If you don't get proper voltage, replace TPS. If the voltage is ok, it could be your MAP sensor. The PCM wants to see manifold pressure increase and decrease in conjunction with throttle position. In some cases, the PCM itself is faulty. This is the least common cause. Good luck!

[chocolategravyandbiscuits]

Man I need the boys to start filming sideways!!

[workingshlub]

had same problem on my 04 check every ground wire especially the ones at the back of the engine....that was my fix.

[jodytwitty]

My 09 wouldn't idle down i changed all that i ended up finding someone with a high dollar code reader and i went in to the gas and air flow and reset it it manually i didn't reset nothing but that and it worked for me guys code scanner i used said he been working on cars his whole life and he never seen 1 do what mine did and way i. Reset it worked right then he said he ant never heard r seen that b4 but it worked

[samsquires]

I would never use Dorman parts unless you like re-doing this kind of thing.

[ahmedkamalalkamali]

I noticed scratches on ur hands it seems you worked really hard.. exlent job
Should UTUBE watch ur Vedio, they should reward you..
All the Best

[MichaelArmstrong-km]

with my 03 suburban i had the same problem and i did replace peddle and throttle body but the code still came up putting the rig in limp mode...frustrating then i checked a ground that goes to the back top passenger side head and rewired and ran it straight to the battery neg and that seems to keep me out of limp mode 3 months now. oh yea i tried a different throttle module and ended up using original. best of luck

[isaiahwillis]

Thank you for doing a full walk through and telling me it did fix it afterwards most people don't do a complete walk through with every detail

[motormouthjones]

I did everything on my truck, pedal and box on the firewall and the wires to and from it, did new connector to the throttle body and new throttle body, still got it, I have no idea other than to burn the truck down

[Ken-weir]

I had the same problem last night and I checked all the wires and noticed where they run that it gets really hot close to the wires and if the plastic wires sleeves are falling apart then the wires are heating up which will cause you to get a high voltage reading and noticed wires not protected so I wrapped the wire harness leading to the TPS and zipped tied them away from anything hot . After I hooked up the code reader and only one code popped up so I cleared it and was able to drive without a problem.
07 Chevy avalanche.

[faithwhitehorse]

So is your Suburban still running good after you changed your throttle petal sensor?

[henrye]

There's like like 20-30 very common points of failure for this system as soon as they get a little age on them they start popping up one after another. A few of my friend's started at 5 years or around 50-60k miles.

[sidneymeyer]

Have you ever found out what the problem was?

[danielosceola]

A one thing I noticed about your ground wire there that you ran to the block that goes to aluminum section on the front that holds alternator and all that stuff on. I thought you were unable to ground 2 aluminum.

[alexistumbado]

Hey I’m sorry did you ever fix this I have the same promblem rn

[ALFREDOCHANGOMORENO]

I replaced tps, throttle body and maf sensor
The power engine reduced still show up al least one time a day 😔

[survivalmacguyver]

Idk if this is the issue or if this helps but when I bought my avalanche, the fuel door was held on with a bungie cord and hitting the right bump or turning hard right would trip these two codes. I glued magnets to the inside and fuel door stays shut good. Every once in a while the code will come back and if I shut the truck off, go outside and open and close the fuel door the truck gets out of reduced engine mode and runs fine.. Will be going into this further this weekend.