Start/stop alert after driving about 10-20mins

[bcashi17]

2019 2 door JL 112k miles 3.6liter engine. I had the starter and both batteries replaced about 14months ago.

New issue: When I get in it starts up just fine and runs just fine, I always turn off the start/stop since I'm in stop and go traffic alot. But lately I get "Start/Stop not working, Service start/stop" after I have been driving about 15mins. Once I turn it off its gone and when I start the jeep its not on there until i drive another 10-15mins.

At first i thought it was battery issue but remembered mine were replaced when starter was replaced April 2023, anyone have this issue know what may be causing it? I can live without the start/stop but I don't want it to be a sign of bigger issue, that leaves me stranded somewhere.

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[Apples491]

Are you a manual or auto transmission?

start/stop errors have been indicated as a possible early warning of the MT clutch failing.

 

[bcashi17]

automatic transmission

 

[alphawolff]

Pull the codes.

 

[dchemphill1]

There is a list of possible reasons start stop will not work. Check the owner manual.

 

[Bayrat]

Was it under warranty for the batteries and starter? The dealer replaced only the SS battery when mine went bad. That was on my 2019 when I had similar issues as you.

 

[kah.mun.rah]

Back when I had an aux battery mine had to be replaced about every 16 months.

 

[Ratbert]

Back when I had an aux battery mine had to be replaced about every 16 months.

Doesn't that imply there was / is something wrong with your electrical system?

 

[kah.mun.rah]

Doesn't that imply there was / is something wrong with your electrical system?

I was just told that it was an "aux battery thing." If that isn't normal maybe it was the brand of battery I was using or maybe it was because of my electric steps adding extra drain. Either way, if I ever owned one again I think I would do the bypass/delete.

 

[TheNewGuy]

There is a list of possible reasons start stop will not work. Check the owner manual.

"Start/Stop Not available" and "Service Start/Stop" are two different things. The manual covers the former.

 

[mwilk012]

Pull the codes.

 

[Obscurity]

I am getting the same thing occasionally (manual trans). It is always the auto start/stop and the cruise control but it does not happen reliably.

I have looked at the code and there are none.

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