Coolant Temp Warning?

[pcrawfordpt]

Here's an odd one...was towing a small trailer, had Off-Road Pages on and monitoring gauges...everything fine on Off-Road Pages and the vertical Engine Coolant Temp on the left side of the dash cluster. Shut the engine off and get a Coolant Temp Warning message across entire dash cluster - all RED and showing very high temp, something like 419! Start back up immediately to re-check the gauges, and again everything was fine on dash cluster and Off-Road Pages. right in the middle nothing too hot at all. No hissing or boiling sounds. Anyone experience this???

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[ShadowsPapa]

Here's an odd one...was towing a small trailer, had Off-Road Pages on and monitoring gauges...everything fine on Off-Road Pages and Engine Coolant Temp on dash cluster. Shut the engine off and get a Coolant Temp Warning message across entire dash cluster - all RED and showing very high temp. Start back up and re-check gauges, and again everything fine on dash cluster and Off-Road Pages. No hissing or boiling sounds. Anyone experience this???

Uh, what is a very high temp?
You are leaving a lot out - like what were the temperatures being shown?
Coolant temp?
Oil temp?
Do not go by the cluster "thermometer" type gauge - that's only a go/no go indicator. It will stay in the middle area until it gets REALLY hot. Use the actual temperature readings only, now that vertical temp indicator.
It's possible to have "heat soak" where the coolant temperature spikes after shut-down, but without knowing your real temperatures........
What do YOU consider "very high"?
What was the REAL temperature?

 

[Gren71]

https://www.redlineoil.com/waterwetter

?‍

 

[pcrawfordpt]

Uh, what is a very high temp?
You are leaving a lot out - like what were the temperatures being shown?
Coolant temp?
Oil temp?
Do not go by the cluster "thermometer" type gauge - that's only a go/no go indicator. It will stay in the middle area until it gets REALLY hot. Use the actual temperature readings only, now that vertical temp indicator.
It's possible to have "heat soak" where the coolant temperature spikes after shut-down, but without knowing your real temperatures........
What do YOU consider "very high"?
What was the REAL temperature?

I was going by the Off-Road Pages cluster and everything was right in the middle. Don't recall the numbers. I only looked at the vertical one on the dash cluster to second check and it was in the middle as well. I don't recall exactly the warning temp message, but I think it said something crazy like 419! It was immediately when shutting down, not after sitting. Re-started and everything was the same on the vertical temp and the Off-Road Pages cluster. Right in the middle. Started again 5 minutes later and everything still the same, right in the middle. Drove another 10 minutes to home, ran fine, all gauges normal still. Started this morning and everything seemed fine.

 

[pcrawfordpt]

https://www.redlineoil.com/waterwetter

?‍

I don't think I was actually overheating...all instrument gauges and Off-Road Pages instrument cluster will right in the middle "normal" ranges. Just this warning message...

 

[Hootbro]

You got a sensor or software issue. The "419" reporting is a bad easter egg of the software reporting as that is the area code of where it was built and also embossed in other areas of the vehicle.

It has been reported before a handful of times.

 

[pcrawfordpt]

You got a sensor or software issue. The "419" reporting is a bad easter egg of the software reporting as that is the area code of where it was built and also embossed in other areas of the vehicle.

It has been reported before a handful of times.

...thank you! I knew it was something weird. Now I just need to figure out what the "issue" is...

 

[Hootbro]

...thank you! I knew it was something weird. Now I just need to figure out what the "issue" is...

I will let you drill down on it but I have a fuzzy memory of one person seeing it, shutting off, restart and never seeing it again. So it maybe a software bug glitch only and not a true hardware sensor issue but I cannot rule the latter out 100%.

 

[pcrawfordpt]

I will let you drill down on it but I have a fuzzy memory of one person seeing it, shutting off, restart and never seeing it again. So it maybe a software bug glitch only and not a true hardware sensor issue but I cannot rule the latter out 100%.

It was and still is running fine. Going to contact Jeep Cares and FCA. They need to send out a letter explaining it's nothing to worry about. If I was overlanding in the middle of nowhere I would be really freaked out!

 

[pcrawfordpt]

Here's a link to the same issue in the Wrangler Forum thread for anyone in the future reading this thread...
https://www.jlwranglerforums.com/forum/threads/help-has-anyone-see-this-before.89039/

 

[Hootbro]

It was and still is running fine. Going to contact Jeep Cares and FCA. They need to send out a letter explaining it's nothing to worry about. If I was overlanding in the middle of nowhere I would be really freaked out!

This is just my speculation but I suspect that the issue is so random and probably not readily repeatable, the Jeep engineers probably do not know the root cause unless they actually were hooked up to a vehicle and data logging when the event occurred. They are not going to put a letter or TSB until they fully understand the problem.

If somebody has a active subscription to Tech Authority, they may find a TSB on it if any is there.

 

[Mr._Bill]

https://www.jeepgladiatorforum.com/forum/threads/temp-sensor-issue.65105/

 

[ShadowsPapa]

https://www.redlineoil.com/waterwetter

?‍

Why?

 

[ShadowsPapa]

You got a sensor or software issue. The "419" reporting is a bad easter egg of the software reporting as that is the area code of where it was built and also embossed in other areas of the vehicle.

It has been reported before a handful of times.

That's what it sounds like. Sort of like what Microsoft used to do. They'd assign a code to an error and say click here to find what it means. The result? "We have no idea what it means".

 

[Gren71]

Why?

Why not?

says it’s supposed to help cool more efficiently. And since the op gave basically no info in the first post it was all i thought of. ?‍

also..Merry Christmas ?

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