Electrical Issues

[2020 Blue Powerwagon]

2020 Power Wagon - my issues started with the key fob unlock working sporadically.... Then it started with not unlocking with the fob if I used the remote start and would say the key fob has left the vehicle, even though I am in the drivers seat..... Now it will turn a number of times before starting and once it starts, the next time you try to start it will not turn over - like the battery is dead. Took it to the local Ram dealer and they could not find any errors. I went to a parts center and they installed a new battery and checked the alternator - everything looked good. they tested the old battery and it was still reading 12v. The person who installed the battery suggested I let it run for awhile so the truck can recalibrate.... I hit the remote start, the truck started and within 45 seconds powered off. I am at a loss, no error codes. I called Ram and was told the key fob not in the vehicle was a known issue, but none of the other stuff was. Any thoughts?

 

[2powerwagons]

As dumb as it sounds, have you replaced the battery in the key fob? Check the battery contacts inside the fob when you do. Might have to tweak them so they're tight.
Like all fobs, they're just cheap garbage.

 

[2020 Blue Powerwagon]

Thanks, I’ll check the connections in the fob…. I did get a code from Oriellys that C2100-16 and a lot of U1267 codes…. But that was after installing a new battery….

 

[2powerwagons]

Yeah, those are low voltage codes. Most vehicles will set a ton of them with a bad battery. Clear them out a re-scan it.
Make sure you put a new battery in the FOB.
Try your spare fob (make sure it has a fresh battery) Could be a bad fob. It happens. If you don't have a spare you'll have to buy one and program it.
Next time it happens, try to push the start button on the dash WITH the fob, literally. See if it starts.
You could have an interior antenna problem. They suggest putting the fob in the middle of the rear seat to see if it's detected.
Scan the RF hub for faults/error messages.
Search says sometimes "broken entry antenna under/behind rear seat"

On another track, have you replaced the halogen headlights with LED's? Seems like there's a common theme with some sort of interference from them causing this issue.

 

[dieselscout80]

On another track, have you replaced the halogen headlights with LED's? Seems like there's a common theme with some sort of interference from them causing this issue.

Your other suggestions are good ones.

On the one above do you mean it happens with factory LED lights or with aftermarket LED bulbs?

 

[2020 Blue Powerwagon]

Yeah, those are low voltage codes. Most vehicles will set a ton of them with a bad battery. Clear them out a re-scan it.
Make sure you put a new battery in the FOB.
Try your spare fob (make sure it has a fresh battery) Could be a bad fob. It happens. If you don't have a spare you'll have to buy one and program it.
Next time it happens, try to push the start button on the dash WITH the fob, literally. See if it starts.
You could have an interior antenna problem. They suggest putting the fob in the middle of the rear seat to see if it's detected.
Scan the RF hub for faults/error messages.
Search says sometimes "broken entry antenna under/behind rear seat"

On another track, have you replaced the halogen headlights with LED's? Seems like there's a common theme with some sort of interference from them causing this issue.

Thanks for all the great info, I have fresh batteries in both FOBs and I have not changed the lights. I stopped at the local dealer yesterday and they scanned and came up empty. I told them the issues I was having and they said until they can replicate it, there is nothing they can do. Thanks again, I appreciate you!!

 

[2powerwagons]

Your other suggestions are good ones.

On the one above do you mean it happens with factory LED lights or with aftermarket LED bulbs?

I'm guessing aftermarket. I just found a few threads on it here and there.


Back to the original issue. I've had it happen on occasion (very rarely) on all of my 19 and newer trucks. Usually opening the fob and making sure the battery was well seated seemed to make it go away. I make it a point to replace the fob batteries once a year.

 

[RamCares]

Thanks for all the great info, I have fresh batteries in both FOBs and I have not changed the lights. I stopped at the local dealer yesterday and they scanned and came up empty. I told them the issues I was having and they said until they can replicate it, there is nothing they can do. Thanks again, I appreciate you!!

If this concern reappears, please don't hesitate to DM us. We're here and willing to have this looked into for answers and support.

Chris,
Ram Cares