Instrument panel going haywire and vehicle stuck in park!

Countrygirl14219

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I recently Replaced my battery in my 2019 Jeep Wrangler Sahara. All went well for a couple days. THEN! The Instrument panel went crazy. All the check system lights came on. The Jeep was stuck in park and a loud fan noise came from under the hood.
After doing some research, I found that while doing this because of the auxiliary battery still having juice to the negative terminal that it was possible, they could have touched during replacement of main battery, causing a shortage to the fuse strip. I replaced that then all is well for a day.
Came out to start it for work and same problem. Checked the auxiliary battery it showing 12 V.
Anyone else experienced this problem?
 

WestCoastDan

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Just a hunch, but if you fully disconnect the aux battery and isolate the terminals from touching anything or each other, what happens?
 
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Countrygirl14219

Countrygirl14219

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So a friend hooked up his snap on scanner. It thrower every code possible in the first few minutes ~ urgh was thinking I was going to need a new TPM unit. He reset the codes and it seems to be ok for now. Will take it out for a test drive soon to see if the problem is fixed. 🤞🤞🤞.
Just for future knowledge always keep some kind of voltage going to the TPM unit when batteries are discounted so it doesn’t complete die and has to reset itself and relearn the vehicle!
 
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BLACKJKU

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So a friend hooked up his snap on scanner. It thrower every code possible in the first few minutes ~ urgh was thinking I was going to need a new TPM unit. He reset the codes and it seems to be ok for now. Will take it out for a test drive soon to see if the problem is fixed. 🤞🤞🤞.
Just for future knowledge always keep some kind of voltage going to the TPM unit when batteries are discounted so it doesn’t complete die and has to reset itself and relearn the vehicle!

Sometimes it's good for it to relearn especially after adding new parts.
 
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Countrygirl14219

Countrygirl14219

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Well ~ after a reset of the codes and an hour drive to relearn everything it went well for the rest of the afternoon. I went out to the grocery store in the evening. It sat for over an hour in the parking lot. Came out to start it. The exact! Thing happened again! Then I unhooked the battery cables a few times hoping it would reset. Nope and then it just died completely. Towed to dealership ~ urgh! Waiting for an estimate.
 
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Speartip

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I've watched a video about the Aux
battery creating all sorts of issues in the JL.
Specifically how it will drain the main battery .
Go check Litebrite on Utube .
There is an episode about the Aux battery .
It's not that old of a video. So should be easy
to find . Maybe whatever they did to resolve
issues may assist you .
 

WestCoastDan

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Joined
Mar 28, 2022
Messages
322
Location
SoCal
I've watched a video about the Aux
battery creating all sorts of issues in the JL.
Specifically how it will drain the main battery .
Go check Litebrite on Utube .
There is an episode about the Aux battery .
It's not that old of a video. So should be easy
to find . Maybe whatever they did to resolve
issues may assist you .
Like I said in post #5...
 
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BLACKJKU

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Well ~ after a reset of the codes and an hour drive to relearn everything it went well for the rest of the afternoon. I went out to the grocery store in the evening. It sat for over an hour in the parking lot. Came out to start it. The exact! Thing happened again! Then I unhooked the battery cables a few times hoping it would reset. Nope and then it just died completely. Towed to dealership ~ urgh! Waiting for an estimate.


Any updates on this?