Service Electronic Throttle

[PackMule]

My "Service elctronic throttle control" CEL continues. Most recently happened while towing at 70 degree outside temp and oil temp was below 240. The dealer says I am working it too hard and If I push FCA on it they will likely void my remaining warranty. I am considering selling at this point.

I've got a similar, yet different issue. Mine is a "Service Shifter" error, started getting it when towing, but now will happen on a hot day, no towing, going up my steep driveway from a dead stop. Engine temps normal.

Some Background... 34k mi on my jeep, put 37's on in March, towed 4.5k trailer to Moab wheeled it, and towed back, 2k mi of towing with no problems.

Problems started just a couple weeks ago after I had a cracked radiator when on a trip to Glacier NP. Saw it and shut it down before engine temps climbed high enough to throw any codes or derate. Had it towed to a dealer for a new radiator.

My "Service Shifter" issue started the day after I got it back with a new radiator when heading into Canada. But it did it only a couple of times when towing and encountering a very steep (6% or greater) hill when having to downshift to 4th or 3rd. It would throw the error code, and if I didn't let up on the throttle, it would throw all kinds of errors and go into limp mode. As mentioned above, shutting down, waiting and restarting would clear the problem... as would just simply cresting the hill and going down hill.

Had it in to three dealers now (two in Canada, and now back with my home dealer) as it has progressively gotten worse until It is now happening when not towing.

In my case, I can't help but think its related to the cracked radiator situation, and is probably a harness, a sensor, or the TIPM that got overheated in that cracked radiator situation, and is shorting or malfunctioning on me whenever that area of the engine gets even slightly hot. Its done it with engine temps at 210 and oil temps in the 220s

I had one Canadian dealer put on a diagnostic tool on the OBDC port, the techs call it a "flight recorder", to record more info than what is stored on board, I gave my home dealer a 57 page printout, and a large PDF file of all the error codes.

We'll see if my home dealer can figure it out.

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[@californiajeeping]

Service shifter is probably the harness by the downpipe rear passenger under the batteries. Super common issue.

 

[PackMule]

Service shifter is probably the harness by the downpipe rear passenger under the batteries. Super common issue.

Yes, I saw a couple posts on that on the JL forum for ecodiesels, where the harness was somehow misrouted on the wrong side of the heat shield next to the EGR and got hot. I asked two of the dealers to check that, and they both said "it looked ok". I'm sure they didn't buzz any lines to verify though.

Right now my dealer has a star Case opened with FCA, and they are starting to swap out components.

 

[graham5david]

Mine did this. Took it to the dealer. He diagnosed it in 1 day. It was the reluctor wheel. The magnet are known to come off and then it cant sense crank position. When this happens it goes into limp mode. If you ckear the cel or reset the pcu it will run normally for a while and go right back. When it fails it starts reading cam position on 21 and up models so you can drive in limp mode. Older 3.0s just die and leave you stranded. There is a recall on it for the 3.0 but they only put tge upgraded reluctor wheel on if your fails. He replaced the reluctor wheel and crank position sensor and all is good now.

 

[Mkelley]

I have the same issue that started in 2021 at 7000 miles every time I tow a trailer. Everything is fine and then I got the lightening bolt, few other CEL lights, and I only had about 1/2 throttle it felt like.... I took it to the dealer and they said there is a TSB recall for the P00AF issue. I was happy to hear it is a known issue. It sounds like it is just a software update.... Honestly I look forward to being able to tow a trailer and get a real temperature derate. Mine would also "pop" at 240 ish oil temp while everyone else could get to 268. I will update everyone on my dealer results.

I am having the same problem and the dealership can't seem to fix. Even after calling manufacture.. Only happens when I pull my sxs on 7x12 trailer over 60MPH.

 

[jeepin48]

I am having the same problem and the dealership can't seem to fix. Even after calling manufacture.. Only happens when I pull my sxs on 7x12 trailer over 60MPH.

sounds like the same issue. No over heating. No melted wire harness. One dealer says I have to prove it. I have no chance in proving that as it happens sporadically. Right now I think it throws the CEL when towing and while a exhaust regen happens. The only way to prove that is by monitoring the DPF % with a scan tool.

 

[Morenm01]

Well she made it to 4400 miles and 2 months of ownership before trouble. Pulling off the highway threw a "Service Electronic Throttle" warning, check engine light, and lost power.

Pulled off. Shut down and restart. Throttle warning gone, and appears to operate normally power restored, but CEL remains.

Dealer was able to get us in on short notice and has code P00AF (turbo related?). They reflashed the PCM per a TSB (18-030-21, can someone look that up?) and sent me on my way. Of course the CEL trips again a mile down the road. Rescheduled appointment later this week when next loaner is available.

Hopefully this is straightforward and doesn't turn into a saga. I have trips planned in the near future. Disappointed that a loaner is a days out. So much for the jeep wave. At least she made it in under own power and didn't leave us stranded.

This has happened to me twice. First time dealer cleared the code sent me on my way. I’m bringing it back in today did you ever find out what the problem was? Both times I was driving about 75mph on a slight incline highway. 2022 eco diesel with 3k miles on 37 inch tires.

 

[suroot]

This has happened to me three times on my 2022. Twice not towing and under moderate load and again this weekend towing uphill. This service report is when I took it in the second time a few months ago:

 

[my dog Trigger]

did any of you fix the pooaf problem ?

 

[djdannis]

Wondering the same thing… Any updates folks? Thanks

 

[my dog Trigger]

I have some news on a part I replaced there was a guy who talked about making a left turn saying turbo lag reallly bad but it got me thinking about mine and the way it drove it had a really long dead spot in the APPS then would shoot like a rocket I thought may be that’s why it’s over boosting Rick said it’s just turbo lag But it wasn’t I bought a new APPS 71.00 mopar parts AZ put it in reset it no more dead spot smooth like Brand new I now hardly notice the turbo lag .But it did nothing for the POOAF still a problem hope this helps if you are having a lag then rockets to like out of control crazy

 

[Rusty PW]

I have some news on a part I replaced there was a guy who talked about making a left turn saying turbo lag reallly bad but it got me thinking about mine and the way it drove it had a really long dead spot in the APPS then would shoot like a rocket I thought may be that’s why it’s over boosting Rick said it’s just turbo lag But it wasn’t I bought a new APPS 71.00 mopar parts AZ put it in reset it no more dead spot smooth like Brand new I now hardly notice the turbo lag .But it did nothing for the POOAF still a problem hope this helps if you are having a lag then rockets to like out of control crazy

What is this? APPS 71.00

 

[my dog Trigger]

What is this? APPS 71.00

Accelerator Pedal mopar 04581893AE $ 71.98 sorry

 

[Vtur]

I have some news on a part I replaced there was a guy who talked about making a left turn saying turbo lag reallly bad but it got me thinking about mine and the way it drove it had a really long dead spot in the APPS then would shoot like a rocket I thought may be that’s why it’s over boosting Rick said it’s just turbo lag But it wasn’t I bought a new APPS 71.00 mopar parts AZ put it in reset it no more dead spot smooth like Brand new I now hardly notice the turbo lag .But it did nothing for the POOAF still a problem hope this helps if you are having a lag then rockets to like out of control crazy

Interesting. What's the pn originally came with your truck?

 

[my dog Trigger]

I've got a similar, yet different issue. Mine is a "Service Shifter" error, started getting it when towing, but now will happen on a hot day, no towing, going up my steep driveway from a dead stop. Engine temps normal.

Some Background... 34k mi on my jeep, put 37's on in March, towed 4.5k trailer to Moab wheeled it, and towed back, 2k mi of towing with no problems.

Problems started just a couple weeks ago after I had a cracked radiator when on a trip to Glacier NP. Saw it and shut it down before engine temps climbed high enough to throw any codes or derate. Had it towed to a dealer for a new radiator.

My "Service Shifter" issue started the day after I got it back with a new radiator when heading into Canada. But it did it only a couple of times when towing and encountering a very steep (6% or greater) hill when having to downshift to 4th or 3rd. It would throw the error code, and if I didn't let up on the throttle, it would throw all kinds of errors and go into limp mode. As mentioned above, shutting down, waiting and restarting would clear the problem... as would just simply cresting the hill and going down hill.

Had it in to three dealers now (two in Canada, and now back with my home dealer) as it has progressively gotten worse until It is now happening when not towing.

In my case, I can't help but think its related to the cracked radiator situation, and is probably a harness, a sensor, or the TIPM that got overheated in that cracked radiator situation, and is shorting or malfunctioning on me whenever that area of the engine gets even slightly hot. Its done it with engine temps at 210 and oil temps in the 220s

I had one Canadian dealer put on a diagnostic tool on the OBDC port, the techs call it a "flight recorder", to record more info than what is stored on board, I gave my home dealer a 57 page printout, and a large PDF file of all the error codes.

We'll see if my home dealer can figure it out.

Something don’t sound right need to check all the wiring harnesses my dealer damaged many of mine because their always in the way I’m still finding wires were the insulation is pulled back you can’t get your hands in there

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