Speed issues

[Always a 1 ton]

Hoping someone out there knows whats going on with my 2012 Ram 3500, 4x4, 6 speed, 6.7 liter.
ABS light on, traction control light on, EM brake light on, speed way, off. All happened at once.
Dealer told me my tires are the wrong size so I know they are clueless.
Took it to a good shop for diesels, as well but they couldn't figure it out either.

Dealer took a guess and replace the speed module? That only lightened my wallet.

 

[MADDOG]

It was probably the speed sensor that the dealer replaced and that's one possibility.

I suspect the front control module is glitched. Any other front dash lights or controls not working properly?

Did you get the codes pulled? Those will help but I can't figure out why, if they did it, the dealer couldn't figure that out.

 

[Quick_Shifter]

Did you or any of the shop's try disconnecting the batteries and let the computers drain for 30 Minutes? If its not throwing any codes its a bunch of rabbit holes to jump down. If you power down the glitch might clear itself out (Hopefully) or may not do it all at once when they relearn.

 

[Always a 1 ton]

Well...the first thing I did was disconnect batteries to try to clear it. No luck
Second thing I did was took it to a Ram dealer. They first said wrong tire size, but tires have been on form 3 years so thats clearly not the issue, then they said its the tuner (mini max), but thats been on for 4 years so thats not the problem. Then they said they connected some diagnostic tool to the front tires were reading same speed, but a different speed than both back tires. They reasons a bad speed sensor would show a single wheel speed off, not both axles different speeds. So they recommended replacing the ABS module, which they did and no change.
The Third thing i did was call a reputable shop, described the history, and asked if they thought they could fix it.
The said they would give it a shot so I dropped it off. They also questioned the ABS module and though maybe it had not been programmed by the dealer. Him hawed around a bit, before telling me they cant fix it.
The fourth thing I did was call the service manager at the dealer, who assured me the module had been activated.
Im not quite ready to run it off a cliff, but Im getting there.

 

[SYKRAMMAN]

Sorry to hear that man, its bs when the manufacturers of the truck can’t even figure out what’s wrong with it, smh.

Nowadays a tech has to be a computer wiz and a mechanic!

 

[Pull Ya]

To many of them are just--wiz's
Jay