Remote start won’t work in cold weather

[lolly4115]

Any ideas why my 2019 Rubicon’s remote start won’t work during cold weather? It always has until recently. Thanks

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[j2.pictures]

How cold are you dealing with? Does it give you a message in your instrument cluster on why remote start would be cancelled or not working?

Usually it would not work because of a door being slightly open, or if you tried to remote start the vehicle before, turned it off, and tried to do it again.

 

[Heimkehr]

Batteries that are approaching the end of their practical service life sometimes serve as the [invisible] source of a variety of seemingly unrelated electrical issues. Give some thought to replacing the vehicle's battery as a prophylactic measure, doubly so if it's the original one from 2019. The many electronic encumbrances in modern autos place demands on batteries that older vehicles did not.

The chains, like Advance Auto, usually offer free battery load testing, if you want to determine the health of your Wrangler's battery before investing in a new one.

 

[Valpo Jeep]

Weak AUX battery probably. Change both though. Sadly that is about $350 on batteries though

 

[Opus]

I'd maybe start with replacing the key fob battery if you haven't already.

 

[jhackathorne]

Also what is your fuel level? I can’t recall what it is, but it has to be at a certain amount to use remote start.

 

[TheNewGuy]

Any ideas why my 2019 Rubicon’s remote start won’t work during cold weather? It always has until recently. Thanks

I think if you have a CEL it wont work. Also wont work with less than 1/4 tank of gas.

 

[cobra]

Batteries that are approaching the end of their practical service life sometimes serve as the [invisible] source of a variety of seemingly unrelated electrical issues. Give some thought to replacing the vehicle's battery as a prophylactic measure, doubly so if it's the original one from 2019. The many electronic encumbrances in modern autos place demands on batteries that older vehicles did not.

The chains, like Advance Auto, usually offer free battery load testing, if you want to determine the health of your Wrangler's battery before investing in a new one.

This. If your jeep is still under the 3/36 warranty, the dealer will replace it.

 

[GtX]

https://en.m.wikipedia.org/wiki/Correlation_does_not_imply_causation

 

[Dan M.]

If you haven't tried yet, attempt to use the remote start while standing right next to you Jeep. If it works, likely your key fob battery is dying. If it still doesn't work, probably one of the issues noted by the others on this thread.

 

[lolly4115]

I'd maybe start with replacing the key fob battery if you haven't already.

Tried that, still didn’t work.

 

[JeepinJason33]

Depends on how cold it is. It was -18 here yesterday with -50 in wind chill. I went out to start my daughters XJ for her and even with a brand new battery, it took several cranks and a bit of finesse to get started. Most auto starts will only hit the starter for a second or two. Your battery might not have enough juice left to crank over on the first try and then the auto start will not work.

 

[lolly4115]

How cold are you dealing with? Does it give you a message in your instrument cluster on why remote start would be cancelled or not working?

Usually it would not work because of a door being slightly open, or if you tried to remote start the vehicle before, turned it off, and tried to do it again.

Battery was replaced by dealership last year, when they had it for over 4 months trying to figure out what was wrong with the electric system. You can hear it try to start, but won’t turn over. Temp outside is 20 degrees, windchill -10. Gas tank is full.

 

[Rhinebeck01]

Tried that, still didn’t work.

Undoubtedly battery(s) related.

COLD weather has a very negative impact on batteries. IF battery(s) are depleted enough remote start will be a no go as the JL's computer sees the depleted 12v level and will not allow remote start.

Have a shop load test both the Main and Aux. battery on the vehicle.

Having changed out the battery(s) a year ago means nada. Battery(s) could be bad/iffy or just depleted enough to cause an issue.

You could try placing the JL on a battery tender/maintainer until the tender indicates charged.. Right after this, try a remote start.

 

[Dyolfknip74]

Battery was replaced by dealership last year, when they had it for over 4 months trying to figure out what was wrong with the electric system. You can hear it try to start, but won’t turn over. Temp outside is 20 degrees, windchill -10. Gas tank is full.

I've remote started in much, much colder than that. Does it fire up right away with a normal start?

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