I will have to say of all these videos I've watched on Reduced Engine Power for Chevrolet, this did it,frustrating ain't the word , hats off to you my friend . THANKS

I had a p1518 code / reduced power and I checked the ground wire at the rear of the engine block passenger side and it popped right off. I believe that was the problem. I cleaned all the other ones but I didn't know about that one until I watch this video .I will report back after I've reconnected and driven a while. Thanks!

I just did the same to my 2008 HD an it also fixed the problem I had code P2135 .. thanks for taking the time to put this up.... all it cost me was a 24' grounding strap... I had 4 ground location and each one was corroded ..I cleaned them all.. and still installed the extra strap .. do not know which one fixed it but its working and I also note my Alt is charging higher so that is a double check that problem was grounding issues.. thanks again

Thank you so much for this video save me a headache Was having the same problem until I seen this video my ground was broken thank you

Thanks I just fix my Tahoe problem thanks to you …….problem solved

Simple. To the point. A good diy thank you.

you have a solution out of many.

@2009adtommy

2 жыл бұрын

Yes both trucks have been flawless since. Thanks for watching. My videos are too long but oh well. :)

My 2003 4x4 tahoe just hit 350,000 miles, still runs strong, doesnt burn oil, no cold knocks, great acceleration. So on so forth, at 346,000 reduce power started going on, and it seems more often when i use cruise control. Im gonna give this a shot sunday.

@2009adtommy

3 жыл бұрын

It is normally the throttle body, sensor at the foot pedal, a grounding issue, or the connector at the throttle body. Best wishes and here is another good article... www.justanswer.com/chevy/2euir-2004-tahoe-cruise-control-auto-zone-loose-wiring-tps.html

Properly routing wires can save you a headache down the road

Thanks I appreciate that

The steel, wires and connectors used on gm vehicles is a special alloy that has Alka seltzer in it. Slightest exposure to moisture melts and corodes them. I've only ever seen this happen on boats used in the ocean. Everything in these vehicles acts like they have been hit with salt water. That's American engineering/corporate thinking for you build it cheap as possible..

@jefffrayer8238

10 ай бұрын

Salt water? Maybe all the chloride they put on our dirt roads in summer, plus chloride & salt in the winter? Salty ocean air?

@henrye718

10 ай бұрын

@@jefffrayer8238 i have owned 9 boats and my second job is working in a marina for the last 31 years in the northeast. We know about the effects of salt water and corrosion. We coat the underside of our trucks once when new or when we first get them, put greases on the grounds and never have problems with the chassis, last as long as the drivetrain. They use non zinc plated, cheapest components possible to save a few pennys so....

Thnks booss man 🙏🙏

Thanks man saved me!!

@2009adtommy

8 ай бұрын

No problem 👍

My 2000 Yukon xl has 283,128 miles and it's still running like a top

@alfredthesavage7793

3 жыл бұрын

235000 on mine. Living on borrowed time. LOL

Any suggestions for a PO120 code fix ?

It will work till burns up something ground wire is supposed to be no more the 18 inches good luck my friend

@2009adtommy

2 жыл бұрын

I am listening and willing to learn. Give me a web link regarding max 18 inch ground wire and I will post it. Remember don't do what I do! 🙂 I think if you brought it back to original condition, you can go worry free for another 100k miles. But nevertheless send me the link. Never heard of this before.

What size bolt did you use

atta boy pat on the back to ya

What size of nut is that on the block motor

Before you do anything have your alternator tested that was my problem or a negative battery cable.👍

@mookeymccaskel1130

Жыл бұрын

Wym the battery was the problem??

@mookeymccaskel1130

Жыл бұрын

Philly dee

I do tomorrow bicouse i have the same problem

I have a 2003 yukon denali xl 6.0...ive been getting the reduced egine issue while driving on the high way. Ive cleaned the grounds under the drivers side door. And cleaned the ground your showing here. U said there is 2 other grounds 1 behind the engine and the other is located where?

@2009adtommy

5 жыл бұрын

Check out this page. There are two grounds in the back. www.tahoeyukonforum.com/threads/reduced-engine-power-anyone-have-a-stick-of-dynamite.111617/page-2

@2009adtommy

5 жыл бұрын

I have done everything possible and it went away for about 4 months then came back again. Turns out the throttle body electric plug I replaced has a short in it somewhere. Need to replace it again. This is nuts. Who thought of this nonsense. Need to go back to the cable system. That was nearly foolproof.

@alonsogaribaldo1939

4 жыл бұрын

Hi What is the size of the bolt you use to attach the wire to the engine? Thanks

@eugeniofloresjr.3062

3 жыл бұрын

@@2009adtommy how’s it going now ?

@2009adtommy

3 жыл бұрын

@@eugeniofloresjr.3062 The one truck suddenly started doing it again but the problem was the rewiring I did for the socket. I soldered the wires and it immediately went away. Other than that is all works smoothly. Almost forgot about these issues. I have 2 2003 tahoes I had to redo.

Hi so I wanted to try this out on my 2000 Chevrolet tahoe LT 4x4 5.3 v8. So before messing with any wires. Should I disconnect my battery cable's??

@2009adtommy

2 жыл бұрын

Yes it is always wise to unbutton the battery but before you do this, do you have a cable throttle? I am pretty sure that model year didn't have an electronic controlled throttle body. Confirm before you go through all of this.

@aprilviarreal441

2 жыл бұрын

Ok sir I confirmed that my 2000 Chevrolet tahoe LT 4x4 5.3 v8. Has cable throttle instead of the the electric. So do you think the 40inch negative battery cable will work sir??

@2009adtommy

2 жыл бұрын

@@aprilviarreal441 so I am not familiar with the cable throttle model. Likely it is still a grounding problem. Sorry I can't help.

@aprilviarreal441

2 жыл бұрын

@@2009adtommy hi sir is your egine the 5.3 vortec v8 4x4? Cuz that's what mines is. And i was really looking close to your egine in your video. And your egine is the same thing as mine. I wish I would know if this ground wire fix you did would work on my Chevy tahoe LT 4x4 5.3 v8. Cause I was gonna go tomorrow in the morning to buy the 40inch negative battery cable..

@2009adtommy

2 жыл бұрын

@@aprilviarreal441 it is the 5.3. Likely you will need to do the 40 inch cable, along with the grounds under the drivers seat. I hope it works for you. I don't know anything about the cable throttle system. Proceed at your own risk please.

What size bolt did u use to put the ground cable in?

@2009adtommy

4 жыл бұрын

M10-1.5x12 bought from eBay.

@alonsogaribaldo1939

4 жыл бұрын

@@2009adtommy thanks Tom

@alonsogaribaldo1939

4 жыл бұрын

After installing the ground cable did you get static noise?

Please help me out i have a 04 that starts and drives but after operating temperature or a few miles of drive time it will go limp with no pedal and it shuts down and then it won't start right away but after a few minutes it will start again and then all over again after a few minutes so I've been breaking down 5,6 times every time I move it ????????

@2009adtommy

3 жыл бұрын

When u say shuts down. Are you saying engine is off and not running or are you running but in reduced Engine power. Is your engine completely shutting down?

@2009adtommy

3 жыл бұрын

Also any codes?

@davidgriffin8643

Жыл бұрын

Mine is doing the exact same thing. Did you ever figure out the issue?

So would this work if my tahoe 5.3 v8 2wd wont go pass 40mph

@2009adtommy

2 жыл бұрын

Do you have a "reduced engine power" warning? Other than max 40mph. What other symptoms do you have. Don't worry these engines are simple. Also what year? Do you have a cable throttle?

why didn't you hook the wire to the negative on the battery?

@2009adtommy

2 жыл бұрын

Really good point. Looking under the hood just now, I can't think of a reason why not and it would be cleaner. Didn't think it through. Brain fog obviously. Passenger side ground needs to be grounded well and I would still be sure the engine block is grounded as well. If you do this with the thicker wire, it may take some finegaling to bolt it to the negative on the battery. There is not much room. I had to get a larger bolt for one of mine as it came loose. If you don't bolt it tight it will come loose and momentarily disconnect triggering "reduced engine power" as well. Thanks for addition. Need to make a better video now. :) Or you should make one to help others once u are done.

@jonathanwalegir7083

2 жыл бұрын

@@2009adtommy No, please you make the video's it just occurred to me as I just had this problem and the battery negative would be the best ground. Ps I squirted WD40 on the inside of the plug on the left side of the throttle body.

clean add copper never seize good connection !

Reduce power engine light and the gas pedal is dead , replaced throttle body , replaced the plug , check all grounds wires nothing still same situation.... envoy 02, need help!

@boostwhipped24

4 жыл бұрын

did you ever get yours all figured out

@erikenshysolli1894

4 жыл бұрын

EPC replaced ( computer module)

I'll try this way! If it works you'll knkw cause nothing has worked. And it does it randomly

@2009adtommy

3 жыл бұрын

I was at my wits end too. It was driving me crazy. You want to just get rid of the car at some point. But these ideas solved the problem.

So you hooked a ground to a ground?

@2009adtommy

2 жыл бұрын

Yes only because that large ground at the firewall is connected to the back of the engine which I can't reach to clean. Also the ground at the firewall was very corroded. So I grounded it to the front of the engine which I can reach. I even took a wire from the firewall to the ground at the battery for redundancy. Over kill I know but have not had a problem in 3 or 4 years. It is all about the grounds at the back of the engine, under the car under the drivers seat, the throttle body, gas pedal sensor and the wiring harness at the throttle body. I changed them all but what really did it was the grounds. The slightest variation cause a fault. I just had a reduced engine light come on and I was so annoyed and it turned out that the ground at the battery was loose. Grounds are the key.

My reduced EP won't stop.

@2009adtommy

3 жыл бұрын

Brandon, what I have seen is this over the 17 years I have owned this car. It is either the throttle body, foot pedal sensor, the wiring bundle at the throttle body ( if you replace this, I can't express this enough, be sure to solder the connections - watch the other video ), or it is a ground issue at the 3 points of contact mentioned in here. The throttle body ( and don't just change the sensor - change the entire throttle body ) followed by ground issues tend to be the most often remedy. I am not a mechanic so proceed at your own risk and cost. I have been completely issue free since I made these videos. The only issue that came up is that I didn't solder the wiring bundle at the throttle body and it suddenly started happening again a lot. But every time i would wiggle the connections, it would stop. I soldered all connections then all has been well since.

@brandonsmith5692

3 жыл бұрын

I cleaned TB real good already. Already ordered a TPS about 2 weeks ago still waiting on that. So I replace one thing and wait and see if it happens again lol. So its always a waiting game and I lose alot

Do I still need that dumb unable to reach wire?

@2009adtommy

2 жыл бұрын

I would clean it and leave it attached.

What code were coming on?

@2009adtommy

5 жыл бұрын

I had at first P0220, P1515, P2135. Then the last time it was P0220, P1515, P1516, P2135. I have already replaced the sensor at the gas pedal, new throttle body and the connector at the throttle body. I think the ground cable was the main issue. Check out the other video as there is another ground on the passenger side. The passenger side on mine didn't look corroded but I double grounded it also. Remember to remove the grounds on the chassis below the driver seat and brush it real well and reattached. Apparently the bottom of the car is sprayed first then they attach these grounds and hence often the ground is poor. Clean these off also and reattach.

@MatLon28

5 жыл бұрын

@@2009adtommy bought the truck used . Random reduced engine power. Got code p0120, p2101, p2135. I watched bunch of fixed so I added bunch of ground in the engine. Both side wire of engine block to the negative battery and to the firewall. Also cleans and brushed 2 wire under driver door. Fixed the issue for 1 month but came back yesterday with 1 code only P1235. Side note: I notice the previous owner replaced the whole throttle body+ tps, wire harness and TAC module cause it looks brand new

@2009adtommy

5 жыл бұрын

@@MatLon28 Man these cars are going to drive me crazy. The only thing you have left to replace is the sensor at the gas pedal. Maybe someone can do a serious diagnosis for you.

@leobardorocha3081

5 жыл бұрын

I put a new throttle botty..new pedal sensor...still have the same problem...

@2009adtommy

5 жыл бұрын

@@leobardorocha3081 did u clean the connections as shown in the videos?

I get p01516 reduce engine power only whene it rains

@2009adtommy

5 жыл бұрын

Is that the only code you get?

@2009adtommy

5 жыл бұрын

Have you taken care of the three grounding issues first. Two in the back of the engine and two under the driver seat chassis.

@victor2187puj

5 жыл бұрын

Yes i only get it my battery gauge drops from 14 to 13 to 9 whene heat ac defrost is on whene all accesories are on all abs brake tc lights come on

@victor2187puj

5 жыл бұрын

Im going to get a negative wire like yours

@2009adtommy

5 жыл бұрын

@@victor2187puj I actually now have it directly connected to the negative side of the battery. Are you sure your battery leads are all connected tight and your alternators is alright. Low voltage will wreak havoc and put out all kinds of codes. I work on my outboard too and found out most of the problems lead to corroded or lose grounds. people keep throwing parts at the cars and all they had to do was clean a connection.

Mine has 400k miles on it

@2009adtommy

3 жыл бұрын

That gives me hope! I love the vehicle and dont want to sell because for the most part it is bullet proof.

Code1518

I still can't get mime to stop lol

@2009adtommy

3 жыл бұрын

You have either the throttle body(don't just change the sensor) the connector wiring at the throttle body, the sensor at the foot pedal, or the grounds at the various places noted. Under the drivers side, the grounds at the back of the engine and at the firewall. If you have done all of this then when redoing your connections one or more were done poorly. This is was happened with me at the throttle body connector. That is all I know. Mine haven't had a problem in years now. Note my last video of what I had to do as one of the connections was shorting.

@brandonsmith5692

3 жыл бұрын

I did the pedal. Cleaned throttle body cleaner my grounds hood ground is gone. So next i am just gonna buy a new throttle body with the new censor attached already. I haven't touched any wiring

@2009adtommy

3 жыл бұрын

@@brandonsmith5692 I wouldnt spend the money until your grounds are all in order.

@brandonsmith5692

3 жыл бұрын

I fixed and cleaned them all besides the hood ground and i cleaned the one behind the engine. Well the top one couldn't get the back. Hood ground has been gone for years and it never happened after that was gone so it's something else. I'll buy a new ground for the hood but idk how a good ground would do that but I'll try that first

@2009adtommy

3 жыл бұрын

I am not sure what you are saying. there are two grounds coming from the back of the engine. Passenger side needs to be grounded to the engine. The other runs to the hood. You can also connect it directly to the ground on the battery. but there is more than one ground at the back of the hood. use the other ground so you dont have to buy anything. I then grounded the hood directly to the ground of the battery for good measure. Anyways, if you havent replaced the throttle body i would get that replaced also. dont buy cheap chinese though. This way you wont cry twice.