Different ESS and ESC Issue

[Krawdiggity]

Hello - I have been searching the forums and cannot find anything related to my issue.

2019 Jeep JL Unlimited Sahara 2.0L eTorque 57,265 Miles

Yesterday we were driving up to a trail still on paved roads, 85 degrees out, AC on. All of a sudden the Service Electronic Stability Control and Stop/Start Unavailable Service Stop/Start System warning lights came on with a check engine shortly thereafter. These lights have stayed on. I ran Coney Flats trail over the course of about 4 hours and drove all the way home, lights were still on. I let it sit for a few hours and they still came on. Tried to disconnect the battery and they were still on. Same thing today.

Since I have the eTorque I do not have the auxiliary battery to replace so that is out of the question. Any insight into this issue would be great and much appreciated.

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[The Fixer]

Might wanna load test the main 12v battery, since that's what is powering the accessories during a Stop/Start event. The 48v battery just cranks over the engine.

 

[Krawdiggity]

Thanks. I will have to give this a shot when I get home this evening. I did end up replacing the battery about 3 years ago so maybe it is starting to fail.

 

[mwilk012]

This forum has everyone brainwashed about batteries. It’s not a battery problem, it’s a single failure in the ABS system. Pull codes.

 

[jaymz]

I had a similar set of symptoms, minus the check engine light, that turned out to be a failed vacuum pump.

 

[The Fixer]

This forum has everyone brainwashed about batteries. It’s not a battery problem, it’s a single failure in the ABS system. Pull codes.

Not gonna lie, it's always the first thing I think of, that's why I posted it LOL. I did miss the fact that his CEL came on as well. Gotta know what that code is to help diagnose.

 

[Krawdiggity]

So I tried a load test on the battery and everything was within normal ranges. I took it to Oreily and had them do a test. Battery and alternator were fine. Starter was pulling to many amps and failed but it starts right up so go figure.

I tried to pull codes yesterday and only had an EGR monitor bank 1 result low.

Now don't be mad at me for this. I read in some thread about a guy putting a lift on his jeep and a year or so later it threw the warning light. My steering wheel was maybe 15 degrees off center and has been for 3 years. I adjusted the drag link and drove around for 10 minutes and both lights went out. So yay I guess? I feel like a real idiot.

 

[mwilk012]

The tool you used to pull codes didn’t work right. EGR monitor isn’t a fault code. What faults were in the ABS module?

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