ShadowsPapa
Well-Known Member
- First Name
- Bill
- Joined
- Oct 12, 2019
- Threads
- 178
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- 29,083
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- 34,566
- Location
- Runnells, Iowa
- Vehicle(s)
- '22 JTO, '23 JLU, '82 SX4, '73 P. Cardin Javelin
- Occupation
- Retired auto mechanic, frmr gov't ntwrk security admin
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That fits because mine has never had any light come on, the ESS has worked just fine, and my engine is smooth as silk, even after a cold start. Granted, with hot weather if the AC is on I notice the load of the AC making it a bit less smooth, but the engine doesn't misfire and doesn't "run rough" ever.Just got the TSB 18-224-021 Update PCM software and replace Camshaft.
This might be TL;TR and some of it is just a copy and paste of some old notes, so forgive any spelling or grammar issues.
A little history as I have not posted to this thread for over a year, but have been actively watching it since I was dreading the day my CEL would come on again.
Purchased an Overland in early May of 2020.
Had to take it back to the Dealership the next day because the Auto Start/Stop light came on and stayed on.
Diagnosis was that the vehicle was on the lot too long and low secondary battery voltage was triggering it.
They replaced the secondary battery after approval from FCA.
Afterward, Everything seemed fine, but the Auto Start/Stop light came on about 3 weeks later. It reset the next time the vehicle was started. Called the dealership and they said that can happen for various reasons.
Did not have the warm and fuzzies.
3 days later still less than a month after purchase the CEL came on and stayed on.
Took it to the dealership on 5/27/20
The tech was able to reproduce a P300 multi-cylinder misfire on cold starts. Cylinders 2,4,6.
Theory was a casting defect.
5/28/20.Service manager called. Said to plan on keeping the rental for awhile.
There is another jeep with the same problem that was built within 2 days of mine.
Engineer called them and said this is popping up all over. The engineer has a Gladiator that is exhibiting the same symptoms and told the dealership to not touch the Gladiators until he takes the engine apart to figure out what is going on with the one he has.
6/1/20
FCA gave the dealership the ok to take the engine apart, and they found a piece of metal that was disrupting the intake, and timing, causing the cold start misfiles.
They have a list of VIN numbers within certain build dates that have the problem.
They will be replacing the engine with a new one right off the factory. Will probably have it back mid to end of next week
6/9/20
FCA Engineers now think it might be a software fix as it is only happening on certain cold starts.
It sounds like the metal they were referencing earlier was found in the oil filter, and engineering confirmed that this was not unusual, they even confirmed they saw it in another model Jeep.
The recommendation was for me to pickup the truck and drive it until a software fix is done. The code has been reset and the check engine light is off.
If the light comes on, just keep driving it unless it doesn’t drive correctly, flashing light, stalls etc. Then take it to the service department.
They do not know why it is happening more in KC, a theory is that the weather (temp) has something to do with it. Now that it has gotten quite warm, they were struggling to reproduce the misfire.
Took it for a couple drives for at least 50+ total miles with no problems.
Fingers crossed
** Note that over the last year until 8/23/21 the CEL has not come back on, but I was getting periodic Auto Start/Stop errors which alway reset after the next start. Could go weeks before one would happen
These errors typically would happen after a start where the engine was already warmed up. Like when running an errand, but not always.
About a week or 2 before the CEL came on on 8/23/21. I noticed that the Auto Start/Stop error seemed to be happening much more frequently, even on a cold start. Was planning on calling the Dealership about that.
8/23/21
The dreaded CEL returns
19,021 miles
8/25/21
Took it to the dealership, but they didn’t get to it till later that day.
8/26/21.
They confirmed issue and a fix but needed to wait for parts (New Cam Shaft)
**Note, I specifically did not mention the TSB to the dealership as I wanted to see what their recommendation would be. I was pleased that they were aware of the TSB which has not been the case for others posting on this thread.
8/27/21
Have the Gladiator back. It’s only been a few days and about 45 miles, but no CEL, and the only thing I have noticed is that after a cold start and letting the RPMs idle down to < 1000, the engine runs smooth. Prior to the fix I noticed that there was a small bit of shaking / running rough at low RPMs, until the engine warmed up.
I will keep this thread updated. I have a 5000 mile road trip planned in mid September and will post back to this thread after that unless things go sideways before then.
Fingers crossed again.
Assuming mine came from the factory without these issues, then it could be used as a base to compare against. Almost 19,000 miles, no misfires, no rough running.
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