Replace both batteries and have the PCM updated/reprogrammed per TSB 18-092-19. Very frustrating symptoms, but an easy fix. Very common problem. Every dealer should know this.
And check the fuses. Make sure they are fully seated. Another common frustrating problem.
Yes, mine is an automatic. Only warranty repairs I had were steering box replacement and track bar replacement (common on 2018's), main and aux batteries replaced, software updates for power control module and infotainment system. Dealer performed all warranty repairs without any issue.
The Lasfit bulbs started giving me a "Bulb Out" warning message if I was on the brakes for a few minutes, like in the drive thru line.
I have replaced the Lasfit bulbs with the 3157 Red LED replacement bulbs from Diesel LEDs...
I had both my batteries replaces 2 weeks before my 3/36 expired (at 35.5 months, 21,200 miles).
I reported my ESS was not working and was always getting the "Battery Charging" message. I ALWAYS turn off ESS as soon as I start the Jeep.
After an overnight diagnosis sleepover at the dealer...
2018 JL Sport w/ standard Halogen Taillights
I tried these same Amazon lights. Worked error free for a bit, but I would get a "bulb out" error message when stopped for a bit at traffic signals or the In-n-Out drive thru.
I switched to these LED replacement bulbs from Diesel LEDs. I had not...
I guess what I wrote was a bit misleading "module reset only lasted 2 days." I believe the module reset is fine. ESS only worked for 2 days after module reset. The original batteries were probably too far gone for the module reset to help with the batteries. So far, after 4 days with the new...
So, to put an end to this story,
Took it to the dealer and I reported "ESS system not working, always getting message Battery Charging." Dealer diagnosed problem with battery charging module. They said batteries were only charging at 38%. So, they reset the module and now batteries charging at...
I have a 2018 JL Sport S w/ 3.6 ESS & auto. ESS stopped working and always shows message “Battery Charging”. Everything else is working fine. Today I took it to the Dealer for oil change and asked them to load test both batteries separately. Below is a pic of the test results. They said there...