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Dealership question for auto repair
Crunchy:
Anyone know if a Ford service department can flash an ECM on a Ram 2500. My rear parksense sensors stopped working and I would like to get them fixed. I would take it to the local Dodge service department but my diesel has a couple of "mods" that if the dealer updates the ECM will cause me problems. I get the Chrysler mailings requesting me to bring my truck in for the ECM update, but that isn't going to happen. Thinking maybe take the truck to a Ford service department to repair the parking sensors if I am confident they cannot update the ECM.
thanks
Crunchy
jackelope:
Negative.
The right thing for any dealership to do if the pcm was modified aka tuned is to not touch it. It will more than likely put the truck into limp mode.
As much as I hate to admit it, we did that one time not knowing the pcm was tuned. Truck had zero throttle. It would idle but that’s it. Had to have it towed to a diesel performance shop and fortunately they were able to recover the tune that was in the truck and get it running again.
I’ll add that I don’t know why anyone would have to do anything to the pcm to fix your backup sensors.
EnglishSetter:
--- Quote from: jackelope on February 22, 2025, 09:03:41 AM ---Negative.
The right thing for any dealership to do if the pcm was modified aka tuned is to not touch it. It will more than likely put the truck into limp mode.
As much as I hate to admit it, we did that one time not knowing the pcm was tuned. Truck had zero throttle. It would idle but that’s it. Had to have it towed to a diesel performance shop and fortunately they were able to recover the tune that was in the truck and get it running again.
I’ll add that I don’t know why anyone would have to do anything to the pcm to fix your backup sensors.
--- End quote ---
He does state Chrysler has an update for the ECM. Not that the ECM would be flashed to correct the parking sensor issue.
Then again, the computer operates a lot of things. My old company truck's infotainment ran through the computer.
I'd prolly speak to the service manager at Dodge and ask if the reflash could be avoided. Or avoid dealers altogether.
jackelope:
--- Quote from: EnglishSetter on February 22, 2025, 09:57:42 AM ---
--- Quote from: jackelope on February 22, 2025, 09:03:41 AM ---Negative.
The right thing for any dealership to do if the pcm was modified aka tuned is to not touch it. It will more than likely put the truck into limp mode.
As much as I hate to admit it, we did that one time not knowing the pcm was tuned. Truck had zero throttle. It would idle but that’s it. Had to have it towed to a diesel performance shop and fortunately they were able to recover the tune that was in the truck and get it running again.
I’ll add that I don’t know why anyone would have to do anything to the pcm to fix your backup sensors.
--- End quote ---
He does state Chrysler has an update for the ECM. Not that the ECM would be flashed to correct the parking sensor issue.
Then again, the computer operates a lot of things. My old company truck's infotainment ran through the computer.
I'd prolly speak to the service manager at Dodge and ask if the reflash could be avoided. Or avoid dealers altogether.
--- End quote ---
There are probably 15 “computers” in the truck unless it’s 25 years old, but since it has backup sensors I’m assuming it’s a newer truck. Park sensors would be run through a body control module. When he says “ECM” I’m assuming he’s referring to what is mostly now referred to as a PCM AKA powertrain control module.
Nothing would be done to modify the body control module that has to do with performance, tuning etc. and nothing would run through the PCM that would control the park sensors.
You’re calling the setup in your company truck an infotainment system. That’s a Ford term so maybe it was a Ford. That system runs through an audio control module if it was a Ford.
jackelope:
My point I guess is that you should be able to get your backup sensors fixed without messing with your tune.
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