p0506 Chevy Trailblazer Check Engine Light | Rough Idle FIX | Idle Relearn

Ask My Auto Mechanic gives you complete instructions on fixing the check engine light/low idle problem on your Chevy Trailblazer. See how to perform this repair yourself.

[@jasonpowell8406]

You were very helpful. I like how you went straight to the point. No takin it off just simple maintenance like I thought. Thanks

[@joshjohnston6858]

Just wanted to say I cannot believe how easy this was, I had thus issue with my 07, and did this, and it runs smoother than ever! Thank you for saving me money, because I was about to put it in the shop.

[@ryanesteban6456]

Good information , very helpful, thank you man, keep up helping the regular household mechanic

[@wayneastephens7443]

Same issues with our 2006 TB.Very good video. Thanks for being there. Wayne

[@jonboyking7885]

Thanks for this video! Helped me fix my 05 Colorado with the 3.5 I5

[@mr.boombambiscuitsakajoel6017]

Thankyou you helped me out a ton. This is me returning the favor. Thank you

[@JayJay-nm2xm]

Awesome teaching...just remember not to open the throttle plate with our hands....switch the key on.not start..then someone press the accelerator to the floor. Until the plate opens

[@kenlovan3931]

Thanks. I will apply this new knowledge on my 2005 GMC Canyon. Kudos!

[@douglasanderson1151]

This channel is so under rated

[@askmyautomechanic4133]

Check us out and message us on Facebook. Free car repair questions anytime. facebook.com/askmyautomechanic/

[@clintonaldridge7894]

THANKS YOU HAVE JUST SHOWN ME THE PROBLEM ON MY 2006 CHEVY TRAILBLAZER LS

[@karyfarrell7166]

Thank you You eased my mind Hopefully that’s the only problem when I take it into the garage this morning

[@chris-ci8qc]

my trailblazer was shuting down while driving, so I cleaned my throttle body but I didnt spray like crazy in this video. mo more stalling but my engine light is still on. im very happy that cleaning the throttle body this way helped. i think i just have to get the light reset with a code reader or whatever. i found out u shouldnt just disconnect the battry in trailblazers to reset the light. anyway thanks for the guide.

[@marksdad10]

2008 trailblazer. Very helpful. Thanks

[@bobp.dziadaszek5695]

Thank you Sir you have made it a lot easyer to understand.

[@victorsoto2188]

Thanx for the video. I recently had an issue with my horn, it didn't work. Did some youtubing to fix the the problem and was told to disconnect the battery so the airbag would not go off. No problem, made repairs , horn works. Just one problem, rough idle when i put the air on to the point that it stalled every time. Disconnected battery and reconnected to see if the problem would rectify itself, no dice. Anyway, i read one of your viewers comment and he was changing a speaker system and disconnected his battery and he also got the issue i had. But for chicks and giggles he took your advice and cleaned out the throttle box and it worked! I could only hypothesize that the throttle box butterfly must go into deep closure scraping excess carbons and creating a build up at the inner circumference wall. As i see it. Sorry for the long explanation, hope it helps. Peace

[@wilsonrodriguez3739]

Great job nice DIY video.. My car would shut off when I turn on the AC.. and this was exactly the problem.. it started when I had removed my battery plugs to replace my stereo to an aftermarket.. The car started fine afterwards and idle good but I went to turn on the AC and it started jumpin a bit after 2-3 times it would shut off.. at first I thought I wired something wrong so I switched the radio back to OEM.. but the same problem kept arising.. turns out the CPU was reading dirty throttle.. this helped so much and saved me money.. Thanks!!

[@pyrexpurrvito]

Excellent video excited for more!

[@BladeRunner26364]

I have The exact same 2006 Chevy trailblazer with the exact same problem, thank you very much I will be doing this myself.

[@haroldlucas1240]

Cured my problem ,thanks for info.

[@Jigga-ke4gb]

Dat was splendid job. It definitely worked for me. Thank u 🙏

[@mocajoe2820]

Thanks for this helpful video for my TB. I'm now a Subscribed member.

[@askmyautomechanic4133]

Thanks!

[@dalewise5586]

Just had a friend come to me with rough idle/stalling. As it has over 200,000 miles on it I decided to check a few things before assuming anything. Turns out the spark plugs were Way Past due to be replaced (gap was nearly .80 instead of .42) And they were the wrong plugs. Almost 1/2” short!!! In addition I found a vacuum leak and an intermittent coil pack. Runs like a bandit now! So, before getting knee deep in a repair always verify the simple stuff.

[@hammerheadit7688]

Worked perfectly, thank you!

[@billylinville6881]

Excellent video. Thank you very much. Keep up the great work

[@kennethfillmoreCoolCatKen]

Thanks for the Info gonna be cleaning my Throttle body tomorrow

[@askmyautomechanic4133]

Comment Under this video for any questions or car repair advice!

[@latishamiller302]

Ask My Auto Mechanic helloo

[@latishamiller302]

Can u help me

[@kennethfillmoreCoolCatKen]

Good video I am gonna clean my 2002 trailblazer throttle body tomorrow I am glad you do not have to take it off

[@kevinparrish3740]

My 05 trailblazer was idolizing a lil rough so I’ll take ur advise and clean my throttle botty tomorrow and see if that solves the problem. Im convinced it’s the problem. Thank you in advance

[@harripersaddaniel1592]

Hi bro I have the same problem on my chevtrilblazer I have changed everything to get the service engine light of but I haven't done this before I will try this thanks for the advice on this this is a great channel 😀

[@brentfoto]

Very helpful. Thank you!

[@kevinspangler5489]

Awesome!!! Worked perfect!!! Thank you!!!

[@kennethfillmoreCoolCatKen]

I am haveing trouble with my 2002 trailblazer not idleing right with a check engine light on I think this Video is gonna help me a lot

[@alpinehs]

Thank you for your helpful video.

[@doug06diaz]

Have you ever fixed broken odometer needles. Extremely helpful vid btw. Going to try and clean my throttle

[@blainemalachi2310]

Thanks for your help really knowledgeable

[@mfposoab]

Liked and subcribed!! Thanks for the great vid

[@frankmirabelli5518]

HI, GOOD VIDEO, I WOULD JUST LIKE TO ADD THAT I AM A PRO MYSELF AND HAVE FOUND THAT WHEN I SPRAY THAT MUCH THROTTLE BODY CLEANER I HAVE RUN INTO HYDRO LOCK TROUBLE, I HELD THE THROTTLE BODY OPEN WITH THE ENGINE OFF FOR ABOUT TEN MINUTES TO ALLOW THE CLEANER TO EVAPORATE THANKS IF YOU READ THIS

[@Jmad64]

I just followed the video and right after I put her back together, I fired her up and she shook like a dog, smoked my whole driveway up. I raved the engine 1 time and then it idled like a champ. I wish I kept the flow open for a few minutes now.

[@mr.boombambiscuitsakajoel6017]

My mechanic turned me on to ur page thank him too lol

[@josephbeasley2952]

My 2006 is doing the same thing engine light on ,low Idile and car turn off. I will try this and get back with you. Thanks a lot🕺🕺💯💯👍👍💪💪🤞🤞🤞

[@josephbeasley2952]

It worked cleaning my AIC my car is run just great now. Thanks you now you're stuff.😊🕺🕺🕺🕺🕺🕺🕺💯💯💯💯💯💯👍👍👍👍🌭🤓🤓🤓🤓

[@josephbeasley2952]

The engine light is off also thanks again man.👍👍👍👍💪💪👌👌👌👌

[@tristonrosado1835]

Thanx for the tips 🤝

[@allthemetrix7124]

2006 Trailblazer. 100% fixed the problem.

[@fredcruz2955]

Thanks for the fix on engine light symbol..

[@cesarmelendez7498]

Very good típ. Tanks!!

[@1ohmwrecker]

Thank you very much!

[@corridoscaliforniados3506]

I’m Trying This Same Thing With Mine It Would Take A While To Run Up Thanks A lot

[@HOGSIDESJTV14BOSSHOGRECORDS]

good work

[@McChevy]

Hi, thanks for the video... I have a '02 Chevy Trailblazer and she have some rough idle problems and whilst driving, the motor seems to dip.... No engine light on... Also connected my OBDII reader, and no codes.... I'll give the cleaning of the throttle body a go...

[@delbertfredericks2248]

Thanks. One point opening the throttle plate by hand is ok but don't open it too much and don't let it slam shut this can change the air gap in the plate n throttle body Good info on your post.

[@WoodyWard]

Thanks for the tip 👍

[@stevengorum2727]

Nice ..... I couldn't die for the subscribe button quick enough also I did a thumbs up and I'll clean out my throttle body on my 2005 Chevy trailblazer with 147,000 miles on it I've got a question though how do you put a Chevy trailblazer in neutral say if you run out of gas because I couldn't put mine in neutral when it wouldn't start and I just bought it

[@luchito751]

Thank you.!

[@mynorgonzalez7962]

Thanks for sharing.👍

[@mecalpsha4473]

The ERRATIC IDLE - Replaced the Throttle Body and did a Relearn - No issues this one had never been cleaned and works like a champ now. Depends on the condition of the throttle body - in my case replacing was best solution.

[@74HDJOE]

Thanks for informative video showing us how to do this job.... I appreciate the hiw to lesson. 👍

[@juansalas5783]

Good video sr 👍👍

[@dalegrieco5259]

Grateful...I subscribed. Liked 👍.

[@ProjectCarTV]

nice

[@rhondakendrick2563]

thank u for info

[@angelelicerio9460]

Great information, thanks for the tips.

[@fahimhasnain]

Thanks for winderful vid.. Kindly guide how to get rid of engine maintenance light??If it still remain after throttle body cleaned.thanks

[@luissifuentes8843]

Thanks for the video it help alot. Just one question if i dont have a code eraser machine how can i erase the code?

[@shalomhamachiah1494]

Thanks!

[@AgustinaQuinteroFelix]

Thank you very much. could you do a video showing us how to get out a pcv valve out mine is stock.

[@michelle813]

It could be solenoid vvt, oxygen, crankshft or camshaft sensor. Replaced everything and found out my sensors were bad. Throttle body was first thing I replaced. 2004 trailblazer. I looked up 10 top problems with first generation trailblazers.

[@keevinsimpson5858]

Damn't! My shop rags aren't red! 🤪

[@ericbutts3238]

Hi... Eric in Detroit and I'm having a rough idle problem with a trailblazer I just purchased. It has 154071 miles

[@warrenmorgan4610]

I have an 03 that has had a rough idle for years. I Replaced the throttle body, the coils, harmonic balance, spark plugs, intake gaskets , all the evap sensors, transmission mount, and tuned it up. And still a rough idle. Finally I’m going to change the fuel rail and injection. I hope that helps. If not I’m sending it to pick a part.

[@garyparham974]

I've got an 04 with 240,000 on it . fighting rough idle and stalling problems too

[@terrencealexander5084]

Change the crank shaft sensor. Had the same symptoms your car had. Rough idle went away.

[@MarshallYoungblood]

I just bought my 2004 Envoy knowing it would need some work. After taking a 600 mile trip it started running rough and would often stall at red lights. Then I noticed as I was traveling at the posted 45mph speed the engine was accelerating to 45 and then coasting to about 42-43mph, and then back again. A mechanic suggested I start by cleaning the throttle body. Then I found that the fuse box under the hood had been burnt. Both solid state relays were ruined and a couple mini relays were welded together, and many others looked to be in bad shape. I've replaced all of that - the box and most of the relays and fuses. Sounded bad when I restarted the engine. My code said that the 3rd cylinder (4.2 I6) was misfiring. So I replaced that coil pack and all the spark plugs. Sounds worse now. My code said the 3rd cylinder (4.2 I6) was misfiring. I replaced that coil pack and all the spark plugs. The new code from the scanner says 'Random / Multiple Cylinder Misfiring Detected'. I think my SUV will need to do more than just relearn how to idle. Please help.

[@ajmorgan8441]

Have an 02 with same idle issues. Also drops oil pressure when come to a stop. Thoughts?

[@freedomdiggersmetaldetecti8964]

You should never push open a throttle body! Doing this can damage the electric motor that opens it when the accelerator pedal is pushed. Instead, have a helper turn the key to ON without starting the engine, and hold the pedal down or use a heavy object to do so.

[@RedArrow73]

No. REMOVE it!

[@zeemzero2880]

@@RedArrow73 why, I was about to do this lol ?

[@freedomdiggersmetaldetecti8964]

Removing it is the best way to get the job done because you can access all parts of the throttle blade and body. But you really don't need to do this every time you clean it. Once you have removed it and done a thorough cleaning, if you keep up with regular maintenance type cleaning it should not be necessary to remove it every time.

[@zeemzero2880]

@@freedomdiggersmetaldetecti8964 ok thank you for your reply, good to know.

[@wardaddy6002]

@@freedomdiggersmetaldetecti8964 I bought your old Chevy suburban a blue '93. It had a big sticker on the back window with your screen name on it. It also had a trophy buck hunter sticker.

[@nlw3251]

I have a 2005 Chevy Trailblazer 2.4L 2WD. I had a very rough idle condition and replaced the camshaft sensor, crankshaft sensor, spark plugs, variable valve timing solenoid, air filter, spark plugs, cleaned the throttle body, and replaced all of the coils. It took car of the rough idle when I replaced the coils, but now I get a stall condition with no rough idle when idling at a light on occasion. There are no codes, they all went away. Should I replace the MAP sensor?

[@TB-im1ci]

Take the throttle body off to fully clean it. Not sure what "problems" he could be referring to. It is unhooking on connector, 1 hose and 4 bolts that are all easy to get to. To get it really clean you will need something like a tooth brush to really get all the carbon off. It takes maybe 5-10 extra minutes but it will look brand new and work much better. The back side of the throttle body will look much much dirtier than the front.

[@alleneldridge5711]

Problem with the video you didn't say what the idle supposed to be on those before you did it and after

[@bradlybroderick990]

I had the same problem and i did clean the throttle body and it worked. But i should say that u shoyld take the throttle body off and clean it real good. Because sprayng all that cleaner while its on will blow back into the engine and u will have bigger problems...

[@chevygangd3171]

Hi I have a 2003 envoy when the ac is on and come to stop signs it idles rough and sometimes turns off I already cleaned the throttle good and still does it?

[@GabrielHernandez-yc1bj]

i did the same thing on my 2003 trailblazer i clean the a throttle body and did the a reset too but still gives me a rough idle and when the AC is on sometimes at shakes and at shuts off I change the a fun clutch too

[@DGSantaFe]

This clean up would help with the stalling issue of this model right?

[@bandittweintraub]

Replaced MAF sensor, Trailblazer went into Reduced Power Mode, threw codes for MAP Sensor, then threw P0506. though I cleaned the Throttle Body several months ago. TB had 134k when I bought it, now has 168k

[@77keenbeen]

I have a 2003 trailblazer can't find any videos on changing lower control arms. Please help. It will be greatly appreciated

[@fabianmonje1312]

My 03 trailblazer check engine light is blinking and has a rough idle. Should I start with cleaning the throttle body cleaner? Or is it bigger?

[@keeganjacobs5913]

i just got 3 codes pop up P0506 , P0175, P0172 on my 2013 dodge challenger . Wondering if this can fix all 3 issues or if they are related ?

[@phillwood7894]

My 07 Chevy trailblazer is not going into overdrive it'll shift fine in first second third but sometimes it don't want to go into overdrive I don't know why is it the computer or is it my transmission do you have any information on that please tell me thank you from Oklahoma City

[@djenkin1]

Awesome

[@setlistsongs]

Thanks, my '03 Envoy will be better off for your vids.

[@doncordier6854]

Question ❓ how does moisture get underneath the coil top in the number 6 . I have a 2003 Chevy trailblazer V6 4wd ls. My other question is during these very cold mornings I hear a strange noise that lasts about a minute or two and only does it on very cold mornings.

[@pau-lattaerrutledge7039]

Hey my auto mechanic, do you know where I can purchase an inexpensive code reader? I also have a 2006 Chevy Trailblazer and it is currently having the same exact issue. I noticed in this video that you disconnected the battery to reset the idling, unfortunately this will not reset the check engine light. I really appreciate this thorough video, in fact, it is the best one yet when it comes to this specific problem. I have spent $1500 thus far with "tune ups" and "number 1 misfire codes" , according to my mechanic. I'm usually the drop the car off to get it fixed kind of woman until my Chevy Traverse started having problems. I will let you know how this turns out after working on both vehicles this weekend, as I have become a more "Do It Yourself" kind of woman. Thanks again for this dummy proof video.

[@alfonsogalindo7286]

I have the Ancel AD310. Got it from Amazon for about $35.

[@corridoscaliforniados3506]

I Have A 05 Trailblazer And It Shakes When I Run It Up Any Thoughts Please ?I Need Help

[@JayB-bq7hh]

I have a rough idle, was told it maybe motor mounts, truck has about 117000+ miles but no engine light.............might try this first !!! ??? Thanks

[@kerrywallace2236]

Is there a way to get codes without a reader? Having some issues with an 01 gmc envoy. Its a flip car so I don't want to purchase a reader as i won't be holding on to the vehicle.

[@derekmanning9440]

My check engine light does not come on when I turn the key halfway on my 2007 Trail blazer. I have taken the dash apart and the LED does work but don't know what to do next. Any advice?

[@johnconnolly6011]

Thanks for the info..my envoy 2006 is stalling out after it get hot. I had it feeling it has something to do with the throttle body. Let you know after I clean it.

[@nicholasjacks9932]

So did it work?

[@meanf1502]

I heard it's a bad to disconnect the battery terminals can it mess up the heat controls cause mine the adjustments are off just bought it mine is a 06 ls trailblazer great video mine does this sometimes an my light is on. to

[@Jcw-gj7br]

If you turn the hvac sytem to off you shoukdnt have that problem. Ive disconnected battery several times never affects it. Some people just cant seem to be bothered to turn it off before turning off engine. It creates less of a strain when starting engine.

[@coreythomas7307]

Thanks that was a big help I have a question I have the same truck 2003 truck runs well comes on fine but it all of a sudden stop iddleing when I press on gas no movement of idle put in drive doesn't move can u answer me back

[@2006caddy1994]

I have a trailblazer, it’s rough at idle then dies smells nasty to. I cleaned the throttle body still has the issue. Do you have any tips you can share ???

[@donletson5582]

Excellent info thanks. My question is about engine check light. It comes on and off periodically with a minor pause for about 1-2 seconds Any ideas?

[@kennethfillmoreCoolCatKen]

Bad Coil it's misfiring my Trailblazer did that go down the road the check engine light would flash off and on plus my Cruise Control would not work scanned it was #2 coil changed it the light stayed off and cruise control worked again

[@tylersanders8853]

When i have to do the idle relearn. Do I need need to have the a.c. or heater on? Or headlights for power drain??

[@brianulmer865]

So removing both battery cables fir an hour should dump memory of old idle positions and reset to new one without having to remove any fuses like I’ve seen in other videos for same problems

[@2smoothone670]

I have question. I recently purchased a 2007 Chevy TrailBlazer and today when driving it to work I noticed that my oil gauge was fluctuating between 40 to just above that is this a huge problem or do I just need to change my oil

[@watchstuff1699]

i got a 06 trailblazer but i only seem to have idle problems when it gets cold out (under 40f) any tips if this doesn't work?

[@aggasper5016]

I removed the throttle body to clean it than replaced it all correctly. I waited the 15-30 min with removing PCMB and PCM1. After that the engine started up well idol was smooth. Once I turned my ac/ heat on the idol hit up to 2 almost 3. How do I reset the computer from that?