LOTS OF WARNING LIGHTS

[PumpkinJeepGirl]

I have a 2020 JL with Manual Transmission. I was driving and I got Service ABC light followed by Service 4WD, service Electronic Stability Control, service transmission and something else I couldn't quite catch. I shut it off and turned it back on and a few lights went out a day later and the only light left is service transmission. Drives and shifts fine. On a side note I picked it up Friday because I had some body work done (people really can't drive in Canada) Then Saturday we were out in some pretty deep snow (over the hood) ODB reader isn't picking up anything. Hubby says give it a few days until it warms up and see if the rest of the lights turn off. What do you think?

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[kah.mun.rah]

How long was it in the shop for the body work? Is it possible that your battery was low from sitting there for an extended amount of time?

 

[PumpkinJeepGirl]

How long was it in the shop for the body work? Is it possible that your battery was low from sitting there for an extended amount of time?

It was there for a month So that could be the case, thank you

 

[Bandit59]

I have a 2020 JL with Manual Transmission. I was driving and I got Service ABC light followed by Service 4WD, service Electronic Stability Control, service transmission and something else I couldn't quite catch. I shut it off and turned it back on and a few lights went out a day later and the only light left is service transmission. Drives and shifts fine. On a side note I picked it up Friday because I had some body work done (people really can't drive in Canada) Then Saturday we were out in some pretty deep snow (over the hood) ODB reader isn't picking up anything. Hubby says give it a few days until it warms up and see if the rest of the lights turn off. What do you think?

If your battery was disconnected. You will have to go thru drive cycles to reset everything

 

[hamiamham69]

No one seems to use this term here but it’s called a cascading failure and it’s almost certainly due to battery power or lack thereof. As mentioned above I would give it a few days, clear out any codes using your code reader and - if you have one - maybe put your battery on a trickle charge overnight and see if that helps. If you were having a transmission problem you would probably know it..

 

[vasdimpop]

Also, make sure all your fuses are pushed in all the way. That sometimes awakens the gremlins in the electronics.

 

[kah.mun.rah]

It was there for a month So that could be the case, thank you

Especially true if you have accessories (like in my case, electric steps). I was gone for two weeks and the 1st time I drove the Jeep all of the codes below appeared. After driving it a few days to get the battery fully charged up again, they all went back to normal.

 

[PumpkinJeepGirl]

No one seems to use this term here but it’s called a cascading failure and it’s almost certainly due to battery power or lack thereof. As mentioned above I would give it a few days, clear out any codes using your code reader and - if you have one - maybe put your battery on a trickle charge overnight and see if that helps. If you were having a transmission problem you would probably know it..

Thank you so much. Agreed I think if was the transmission I would know. Just strange everything else went out except that.

 

[PumpkinJeepGirl]

Especially true if you have accessories (like in my case, electric steps). I was gone for two weeks and the 1st time I drove the Jeep all of the codes below appeared. After driving it a few days to get the battery fully charged up again, they all went back to normal.

That is good news indeed. I will give it a few days and see what happens, thank you for responding

 

[PumpkinJeepGirl]

Also, make sure all your fuses are pushed in all the way. That sometimes awakens the gremlins in the electronics.

I will check them thank you

 

[PumpkinJeepGirl]

No one seems to use this term here but it’s called a cascading failure and it’s almost certainly due to battery power or lack thereof. As mentioned above I would give it a few days, clear out any codes using your code reader and - if you have one - maybe put your battery on a trickle charge overnight and see if that helps. If you were having a transmission problem you would probably know it..

This is great advice, thank you for responding.

 

[dchemphill1]

I would prepare to have your Canbus connector replaced. This can be found behind the glove box. This happened to me all of a sudden. Every warning went off and then the speedometer quit and came back and quit again. Seems to be a rather common issue, which is sad for $40000 plus vehicle. BTW. 2020 JL rubicon 2.0t. Keep us in the loop

 

[PumpkinJeepGirl]

I would prepare to have your Canbus connector replaced. This can be found behind the glove box. This happened to me all of a sudden. Every warning went off and then the speedometer quit and came back and quit again. Seems to be a rather common issue, which is sad for $40000 plus vehicle. BTW. 2020 JL rubicon 2.0t. Keep us in the loop

Thank you so much. I will post a reply once I figure it out Lol. Im from Canada it was more like $70,000.

 

[mwilk012]

Without the DTC’s from the ABS and TCM, anything else is purely speculation. You might as well be asking a magic 8 ball.

 

[PumpkinJeepGirl]

Ok so update, reader is still not throwing codes. Was on a dirt road and was going over washboard bumps and all the lights came back on again and slowly hey all went back off except the service transmission. I did charge the main battery it was low, left it over night. Checked that all the fuses were snug, pulled the negative wire on the battery to try and reset things and service transmission still there. My radio still had the presets so I am assuming it didn't reset anything.

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