Jeep Grand Cherokee Code P0128: How To Change Thermostat on 3.6L V6!

[@tgibson9909]

Thanks dude, I did this at 8 pm on Christmas Eve! You saved Christmas!

[@LJsGarage]

That's awesome! Glad I could help.

[@kbron3250]

LJ - Thanks for explaining the vent screw and the process to purge the air. I feel confident to do the job!

[@LJsGarage]

Awesome! best of luck with your GC

[@ramario6195]

Outstanding!!! Thank you!! I was worried I would have to go to a mechanic to get this done and you literally made my day!!! Thank you subscribed!!! 😀

[@LJsGarage]

You are welcome! You got it 😁

[@mishkajb]

Looks easy enough. My error code was also P0218 - Thermostat Rationality (replace thermostat). I had to wait a couple of days for warmer weather to do the repair, so I kept a constant eye on the engine temp. It rose slightly higher than normal, but never rose above the 1st mark (still in the bottom 1/4 of the gauge). My issue started once the weather turned cold. It reset the first time, but now it's 2 days without a reset, so time to swap it out.

[@LJsGarage]

When a headache. Good luck!

[@KaySteverson]

This is the same exact issue im having now and i couldn’t understand how my check engine light went off when it was hot out and than came right back on once it got colder

[@desolatus1]

You mentioned mixing distilled water with 50-50 anti freeze. I think you meant mix 50% distilled water with full strength antifreeze. 50-50 is usually referred to pre-mixed antifreeze.

[@RobMcCullum]

Thanks I needed to see how easy this is for my daughter's 2015

[@LJsGarage]

Glad it was helpful!

[@naume_1743]

50/50 coolant is already mixed for you. You add it strait in. If you mix in a 1 to 1 mix of 5/050 and distilled water you get a 75/25 mix .

[@LJsGarage]

Thanks!

[@ed78vette]

Excellent tutorial buddy, you helped me solve my problem.

[@LJsGarage]

Glad to hear it! Way to get it done

[@blainenelson2319]

Excellent presentation, you’re very well spoken, thanks for the easy to follow instruction.

[@LJsGarage]

You're very welcome!

[@stevenspencer9104]

Thank you my brother. Worked like a charm.

[@LJsGarage]

Glad it helped!

[@oldskaterDan]

Thanks for the video, will be doing my wife’s GC this weekend.

[@LJsGarage]

Right on!

[@irishpat64]

Thank You…Going to give it a try…appreciate the in depth explanation

[@LJsGarage]

Of course! Good luck

[@irishpat64]

@@LJsGarage It went better than I expected…Hardest part was waiting in Auto Parts line!! 😂

[@jerrym2915]

Thank you LJ!

[@LJsGarage]

No problem my friend!

[@miguelsoto3707]

I'm having this issue on a 2017 Jeep grand Latitude. The error apear on the first day of a clold front with outside Temps below 32 degrees. would this have anything to do with the error code?

[@LJsGarage]

For sure could since the coolant is used for heat too so temps run a little higher to heat the inside of the car. Hope that makes sense

[@alexb.1289]

If I clear this code with a reader and it doesn’t come back, does that mean I don’t need to replace the thermostat?

[@LJsGarage]

Yeah I'd say your good. Mine came back every other day so I knew it was bad

[@leonardmc3451]

Thanks for the info👍🏾

[@LJsGarage]

Got you 🫡

[@leonardmc3451]

I’m doing preventative just because I saw 215 degrees on the temperature reading that’s above 203 thermostat. What do you think? I feel the PCM should have noticed the thermostat my guess it’s still within its threshold

[@jonahpena7973]

This video helped me out a lot🙏🏼

[@LJsGarage]

Good to hear!

[@fl9255]

Good video. Did you need to change the temperature sensor as well? Also what's the method to get the code to go away?

[@LJsGarage]

I ended up getting a cooler with new sensors installed so went ahead with that. I needed a reader to clear the code

[@TradewithTeamworld]

Great work, Great work bro !!

[@LJsGarage]

Thanks 🔥

[@legionslaughter6312]

Is it the same for a 2018?

[@LJsGarage]

Should be minus the bleed screw

[@Jussrude]

My A/C doesn’t blow anymore could this be the issue? If so will it work after changing what you changed?

[@LJsGarage]

If anything this would affect your heat but not a/c I wouldn't think. This controls engine operating temp related to coolant not refrigerant

[@Jussrude]

Ok are you familiar with the codes P0440 and P0128 because those are the codes I am getting.

[@danromeo6571]

this is a dream come true if you dont need to replace coolant temp sensor. Thanks

[@LJsGarage]

🫡

[@ogbean82]

I bought my Pops his first pitbull. He heard the stories and I wanted to show him it's how you raise them. After 7 years CoCO and him was best friends. Unfortunately his neighbor Changed his antifreeze and let it go all over the ground. It ran down the hill into a puddle. She drank some and 2 weeks later she Unfortunately passed. They love the sweetness. It's extremely toxic.

[@LJsGarage]

That's heartbreaking 😢 glad I said something then!

[@nelsonm8949]

Hello i raplaced the thermostat on my 2019 grand cherokee but there was no bleeder screw how do i get the bubbles out?

[@LJsGarage]

The funnel method id recommend

[@BiblicalMuse]

Not sure you mix the 50/50 with distilled water. It's already pre-mixed, right? Thanks for the vid, though!

[@Ada-zn3pw]

His coolant wasn't the 50/50 it was the concentrate. Not sure why he said that but if you look at the end when he holds them up it's the concentrate

[@LJsGarage]

I used both I had a leftover bottle of premixed and then I had concentrate that I diluted.

[@numberonekisser]

How long should I have the vent screw loose while the car is running? 15, 20 minutes? Or until no more fluid comes out from the vent screw on the new thermostat? And should the heat be on? Any other variables for this process? Thanks!

[@LJsGarage]

Heat on recommended and it took me about 3 rounds of about 3-5min a piece to bleed completely. Try not to let it get too high in temp as you're doing it

[@numberonekisser]

Thanks so much!

[@Malcolm_Xbox]

​@@LJsGarage Hey, I was wondering the same. But what do you mean 3 rounds and 3-5mins a pcs? Rounds of what?

[@ScooterDawson]

I just did this and now I’m getting 2 error messages, 1) service Electronic Throttle control 2) service electronic stability control. Any guidance?

[@LJsGarage]

Electrical connector on the TB or clean it with contact cleaner. No idea for the stability control based on where you did the job.

[@richcarver24]

Mine is same code it’s not overheating think it’s the sensor?

[@richcarver24]

2014 Grand Cherokee Overland v6

[@LJsGarage]

Yeah good chance it is

[@bilbsk.2510]

Great video thanks

[@LJsGarage]

No problem 👍

[@robertsalazar599]

Love this. Thank you

[@LJsGarage]

You are so welcome!

[@DjgallisTrini]

your vid of removing the air intake was a lot easier

[@LJsGarage]

Glad I could help out!

[@r3conwoo]

after doing this does the check engine light go away automatically or does it need to be reset?

[@LJsGarage]

Had to reset mine

[@enriquereynaga8188]

Will reset itself once the comp realizes it's running at the correct operating temperature.

[@lesliel7517]

Thank you

[@LJsGarage]

You're welcome!

[@rickholt9086]

Thanks !

[@LJsGarage]

No problem!

[@dominickrodriguez4534]

Did he tell ppl to get 50/50 coolant and add water?! I know what the jug says but if you’re trying to tell ppl that don’t know how to do things how, make sure you give correct info.

[@LJsGarage]

I could have explained that better for sure no need to be feisty. I had the concentrate and mixed it 50/50 but I was trying to explain both options including the premixed and ended up stumbling.

[@TheOfficialPates]

Is it called “water outlet with thermostat?” I have the same code and it will cost me $420 for the dealership to do it.

[@jshyne1023]

If it's the same code yes

[@LJsGarage]

I believe it's the same part

[@supay6537]

What the coolant level should be in the overflow bottle when engine is cold?

[@LJsGarage]

Between both lines. It usually doesn't fluctuate too much once bleeding is done. It will fill all the channels and radiator and then level out in the overflow. Hope that helps

[@supay6537]

@@LJsGarage great to know. I had thermostat replaced and coolant flushed a couple weeks after. I’ll check the level later tonight. Thanks.

[@TrevorRitch]

Do you have the part number for the thermostat?

[@LJsGarage]

902-3036

[@anthonylopez6982]

Why would you add water to coolant THAT IS ALREADY 50/50 ..?

[@LJsGarage]

I have both 50/50 and concentrate and I meant dilute the concentrate but think I explained and held up the wrong one

[@12flvsh49]

Same for v8 2014?

[@LJsGarage]

As far as I know identical!

[@12flvsh49]

Appreciate you brudda!

[@809mmg]

Dont mean to call you out but youre using wrong coolant. And that might be your issue. This jeeps coolant supposed to be purple/orange as tthe lights deflect on it

[@LJsGarage]

Not a problem at all I hear ya. I have had no issues with this stuff and idk what was in there prior.

[@relmdrifter]

Coolant is super bad for small animals. All coolant has bitter guard in it if you bought it from the parts store. Not sure about factory fill.

[@LJsGarage]

Very true

[@JG-nk7ld]

Did you need to reset the CEL or did it go off once the part was replaced?

[@miamidolfan19]

I'm pretty certain you'll need to reset it, AutoZone can do it for you or if you have the tool you can do it.

[@JG-nk7ld]

@@miamidolfan19 Thanks, going to reset it today with my reader since after a few trips it didn't clear itself.

[@LJsGarage]

Glad you were able to get an answer!

[@coreychillis9754]

I changed my actuator twice on the driver side and it still won't work properly like for instance if I want heat it will blow heat for a little while then go back cool but then if I want it to blow cool it don't blow cold enough but I know I gotta change my radiator and thermostat it's been on my 2014 ever since I had it

[@LJsGarage]

Good luck that's a pain to track down the issue. Mine ended up being a leak in the condenser

[@MrJjirau]

Thanks for your a input

[@LJsGarage]

No worries!

[@JosephDry]

How long does it take for your check engine light to go out after you replace your thermostat

[@LJsGarage]

I had to clear mine with a reader

[@BrokeCollegeBoy]

Great video, but in 2018 the bleeder screw on housing was removed

[@Ada-zn3pw]

Remove the sensor. You can bleed it at the sensor.

[@LJsGarage]

Thanks!

[@nelsonm8949]

@@Ada-zn3pwwhich sensor?

[@StarOasis26]

Thanks but unfortunately it's too blurry to see what you're doing my friend. we didn't get to see the thermostat.

[@LJsGarage]

Sorry about that!

[@joseernestomoreno]

Part number?

[@LJsGarage]

902-3036 I believe was the dorman part.

[@wfk3rd]

Uh, he skipped the part where he changed out the thermostat. Is this a joke?

[@LJsGarage]

not sure what you are talking about but 2:23 I show the two screws holding it in and unscrewing them not sure what other information you need.

[@Rick-the-Swift]

@@LJsGarage Hi. You show the thermostat "housing" or "assembly" being taken off, although it's quite blurry and then the video is snap edited with the new housing already back on. The thermostat itself is inside that housing, so I too found it confusing as I was interested in seeing the thermostat and it's configuration, not just the housing assembly. But thanks the same for the video, it's still helpful to see how the housing is accessed, and also where the bleeder valve is located. Take care!

[@jonnyblaze872]

What if it’s not reading a code but it’s not blowing hot air? Does that mean it’s heater core? It’s blowing just not hot….

[@LJsGarage]

Could be several things buy more than likely low fluid, air in the system, or like you mentioned the heater core. Thermostat could be bad still too and not opening and closing yet it's reading the right temp and not throwing codes

[@jonnyblaze872]

@ yeah last winter I could hear sloshing when I would take off and when I looked it up it said heater core but at the time it was still working so I didn’t think anything of it. Hopefully it’s not to crazy hard to replace. Gonna try and do it myself along with some spark plugs coil packs. Jeep made everything difficult to work on though. Lol

[@jonnyblaze872]

@ thank you!

[@digger413]

Thanks for sharing

[@LJsGarage]

Thanks for watching!

[@LizCornish-i4q]

thank you!!

[@LJsGarage]

You're welcome!