2018 2.0 ESS battery issue

[spitzer1113]

I have a 2018 with the 2.0 and recently the ESS stopped working. The driver info screen is showing the not ready battery charging message. Most of my searching has only shown info on the 3.6 setup with dual 12V batteries. I know the 2.0 has the 48V battery pack. I'm curious to know if the ESS issue is being caused by the 12V battery or is the ESS handled by the 48V battery. I'm sure this has been discussed but my searching yields on info on the 3.6 engine. Any info on how the 2.0 system is structured would be greatly appreciated.

Sponsored

 

[dchemphill1]

I think you have a small aux battery located directly under the main battery. I have a 2.0 with the ESS start stop and just had to have my Aux battery replaced under warranty at 23000 miles.

 

[four low]

If you have the 2018 2.0 Torque, with the 48v battery, there are conditions that keep ESS " unavailable". Battery temperature ( it has its own heating/ cooling system )
is the main one. Your owners manual has a list of the conditions for the 48v system.
A load test of your main 12v battery would reveal its state of charge, but the BSG ( Belt Starter Generator) that rotates to start the engine is 48v. It also charges the 48v lithium battery, which in turn, charges the 12 battery
On an ESS ( non Torque) the auxilary 12v battery does this

 

[captainstabbins]

I am having the same issue. My ESS just started working again today. It wasn't working for the last 3 weeks. The 48v system is supposed to charge the battery. I have an appointment in March to make sure that it is nothing else wrong. I think it is the shit main battery jeep uses that causes the issue.

 

[spitzer1113]

I checked battery voltage using a multimeter and it is at 12.37 volts. This was a couple of hours after driving. This is probably a little low. I am going to replace the 12 volt battery and hopefully that will resolve the ESS problem. My concern was it possibly being an issue with the 48V battery which is probably really expensive to replace.

 

[four low]

Your E-Torque system is covered by a Federally required warranty of 8 years, 80,000 miles.
Since your 12v battery is original, maybe it is getting towards the end of life, apparently they don't last long.
Did you read across the terminals to see What the charging voltage is while engine running ?

 

[spitzer1113]

That's good info on the 48V warranty. I'll check while running to make sure the alternator is putting out the correct voltage. I am leaning towards needing a new 12V battery as the problem.

 

[Derek]

I had the same problem on my 2018 2.0 back in Nov. no matter how long I drove it, it always said charging battery. I replaced the 12V battery and it shut down at the first stop sign. Also,You’ll probably notice that your MPG has gone way down, the generator is spending all its time trying to charge your battery and not giving you that extra 70 HP.

 

[mwilk012]

It’s the main battery, no big deal. It’s 4-5 years old now, time for a new one.

 

[spitzer1113]

UPDATE: I put in a new 12V battery and the ESS is working normally again.

Sponsored