2020 rubicon auto start stop

[jimim]

Ok since you guys were such a big help with the shocks I wanted to throw around some opinions on why my auto start stop isn’t working all winter and now it is again on and off

80k miles. I think both batteries were changed at 35k cause I was getting a low aux battery message on dash and the auto start stop was working on and off.

batteries replaced. Good to go.

now since this winter which was very cold it started to act up and just not work at all. Now it’s warm again and suddenly it’s working again on and off. Not 100 percent of the time.

it’s going in Wednesday for tires but also for thst issue.

does it sound like a battery issue?

is it because the transmission was trying to heat up when really really cold so that took over vs the auto start stop working?
I have a friend who also has a Jeep same year as mine and she said no issues all winter.

can I possible have another issue going on with a stat not working properly or something else?
Just wanted to have some education before I hit the dealership.

thanks so much,
Jim

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[azjl#3]

You actually saw auxiliary battery low alert, specific to battery?

 

[autotragic]

Ok since you guys were such a big help with the shocks I wanted to throw around some opinions on why my auto start stop isn’t working all winter and now it is again on and off

80k miles. I think both batteries were changed at 35k cause I was getting a low aux battery message on dash and the auto start stop was working on and off.

batteries replaced. Good to go.

now since this winter which was very cold it started to act up and just not work at all. Now it’s warm again and suddenly it’s working again on and off. Not 100 percent of the time.

it’s going in Wednesday for tires but also for thst issue.

does it sound like a battery issue?

is it because the transmission was trying to heat up when really really cold so that took over vs the auto start stop working?
I have a friend who also has a Jeep same year as mine and she said no issues all winter.

can I possible have another issue going on with a stat not working properly or something else?
Just wanted to have some education before I hit the dealership.

thanks so much,
Jim

New car batteries are junk anymore unless you go out of your way to buy a really good one and even then really what you're buying is the warranty. They're all just crap anymore it's hard to get a battery the last 8 or 10 years like you used to. It wouldn't surprise me at all if your aux battery didn't survive the winter.

 

[Texas Longhorn]

started seeing the "Stop/Start Not Ready" msg when the night time temps dropped into the 20's. Added a battery minder for the off driving days and the "Stop/Start Ready" returned. We are back into the 40's at night and high 70's, low 80's now and no need for the minder.

 

[jimim]

You actually saw auxiliary battery low alert, specific to battery?

The first time. It literally said low aux battery. Not this time though.

 

[jimim]

started seeing the "Stop/Start Not Ready" msg when the night time temps dropped into the 20's. Added a battery minder for the off driving days and the "Stop/Start Ready" returned. We are back into the 40's at night and high 70's, low 80's now and no need for the minder.

I never got that message all winter. Also my jeep is in a 55 degree heated garage if that matters.

 

[jludave]

does it sound like a battery issue?

Forget mileage, how long ago time wise were both batteries replaced?

 

[jimim]

Forget mileage, how long ago time wise were both batteries replaced?

2 years maybe

 

[jludave]

2 years maybe

Have them both load tested.

 

[jimim]

Have them both load tested.

ok. so do they have to do that super long test for them? or is a quick test ok?

 

[jludave]

ok. so do they have to do that super long test for them? or is a quick test ok?

It's a load test, so will take a bit, but not too long.

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