2025 Ram 3500 check engine light at 1.7k miles

[Tino]

Few weeks ago had to bring the truck back for a power train software update. After the update noticed smoother shifts and no issues. This morning remote started it. Heard it crank up then turned off immediately. When I got in and started it had the "check engine", "ABS", and "Traction Control" warning light all on. After about a quarter mile the ABS and Traction control lights went off. The check engine light remained. Took it to the dealer and they had about 15 to 16 codes they said. A bunch of communication codes they said. Tech reset the codes said none of them were active still. Told me to drive it a while and let them know if they come back. Just curious if anyone else is having this issue or what's going on since the dealership does not lol.

 

[LBSAND]

I had this issue once, I pushed in all the fuses and it never came back. It happened to me when I tried my CTS3 on my 25.

 

[MavRacer07]

I have a 2025 3500 with 4790 miles on it and had the same issue pop up today. I’m about 3,000 miles into a road trip hauling a large fifth wheel and all of a sudden the Brake malfunction light, ABS Mal light, the adaptive cruise light, the emergency braking light, traction control light, and warnings about four wheel drive and brakes popped up all at once. After a couple of key cycles they all disappeared but the CEL came on. Scanned at autozone because it was too late to hit a dealer today and only U1412 comes up about implausible wheel speed sensors (which could be an ABS comms issue). Last week I got a separate warning “Warning Illumination Lights Bot Available” which stuck around for several days.

I’m concerned this is a comm bus issue related to the new electrical architecture of the 25s.

 

[Cseybert]

Check your fuses in the engine compartment. Make sure they are pushed all the way down.