ABS, ESC, SERV 4WD, ESS Lights On!

[NYC-4X4]

2021 Sport S, Auto Trans, Max Tow, Selec-Trac, 8.4
Owned for: 17 days, 729 miles
These lights came on today about 3 minutes after leaving this morning in 2H and came on again on my way home. I have previously used 4H auto only twice in heavy rain. Anyone else have similar issues? I poked around the forum and saw two similar issues with suggestions that it is a sensor issue, but no updates on if or how it was fixed. My Uconnect app shows the issue as well and recommends taking it in for service, probably to replace a faulty sensor or fix a computer bug. Just thought I would report it here and I am open for suggestions before I take it to the dealer tomorrow if it doesn’t resolve itself. It has been in the 30s and 40s here since I got it, temp down to the teens this morning. It will be up to 50s tomorrow. The cold may be a factor.

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[NYC-4X4]

Update: I started it up a few hours later and SERV 4WD was not on, but the other 3 were. I drove around the block, shut it off, started up again, no lights, drove around the block again, still no lights, ESS worked fine, shifted into 4H Auto, worked fine, no lights. I am hoping that’s the end of it. However, the symptoms were definitely that of a faulty wheel speed sensor that happens to work fine now.

 

[mellendic]

Update: I started it up a few hours later and SERV 4WD was not on, but the other 3 were. I drove around the block, shut it off, started up again, no lights, drove around the block again, still no lights, ESS worked fine, shifted into 4H Auto, worked fine, no lights. I am hoping that’s the end of it. However, the symptoms were definitely that of a faulty wheel speed sensor that happens to work fine now.

anyone have any experience changing a speed sensor? And to anyone's knowledge is that a normal commodity part of is that gladiator/jeep/mojave specific? I am sure mine went bad yesterday while driving home form my kids swim meet

 

[Renegade]

anyone have any experience changing a speed sensor? And to anyone's knowledge is that a normal commodity part of is that gladiator/jeep/mojave specific? I am sure mine went bad yesterday while driving home form my kids swim meet

It’s a fairly generic part, but they rarely go bad. What makes you think it’s the sensor itself, and not a break in the wiring somewhere?

 

[NYC-4X4]

anyone have any experience changing a speed sensor? And to anyone's knowledge is that a normal commodity part of is that gladiator/jeep/mojave specific? I am sure mine went bad yesterday while driving home form my kids swim meet

Mine has been fine from when I made this post until a few days ago when the lights came back on several times again now. For that and another issue, I have an appointment at the dealer on Tuesday. I will let you know.

 

[iadslgladiator]

So I had a somewhat similar experience. While this is a rather obscure/unrelated thing I believe mine was somehow tied to a glitch with my xm radio as my xm went out the same time my dash lit up like a Christmas tree.

I checked fuses to make sure they were all seated as that is a common issue (they were all good)and I've never used xm since. Have not experienced any issues since.

 

[mellendic]

Mine has been fine from when I made this post until a few days ago when the lights came back on several times again now. For that and another issue, I have an appointment at the dealer on Tuesday. I will let you know.

Thanks, i had some odd glitches right after my lift, and now it isn’t going away, getting scanned tomorrow, my ODBII is enroute somewhere on the Evergreen I believe... then I will know, I hope it’s just a loose wire

 

[mellendic]

Thanks, i had some odd glitches right after my lift, and now it isn’t going away, getting scanned tomorrow, my ODBII is enroute somewhere on the Evergreen I believe... then I will know, I hope it’s just a loose wire

the speed sensor wire was completely broken in half, it is now replaces, $66 part and the dealer had it in stock! All alerts went off immediately.

 

[NYC-4X4]

UPDATE: It was indeed a faulty wheel speed sensor. The part will be put in tomorrow. ...Aaaaaand...they are ordering an entire new front axle for the other issue.

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