Asking here since it's tune related.

I know I'm being paranoid but I have a 2017 5.0 with a tune. I bought the truck at the beginning of 2018 and it only has 30k miles so I have a decent amount of time left before the powertrain warranty runs out. I came across a spare PCM for pennies and have access to IDS and know my way around module programming and as-built loading etc.

Anyone here keep a spare PCM around in case you need warranty work? I know you can put your PCM back to stock and reset the KAM but that also resets the ignition cycles and that's a sign to the dealer that you've been a bad owner by purchasing a tune. Why not just have a tuned PCM and a stock PCM if possible???

I did already install and load the spare that I bought. The factory VBF and as-builts loaded right up but I had an immobilizer code that I didn't follow up on yet and I don't know much about the PATS stuff and fixing that code. Also had a crank position code which is easy to fix (if I can get it to start).

If you've gone down this path I'd like to know about it.

 

Looking forward to reading the opinions on this one.
In a Tune thread the answers are probably slightly biased but should be fun to follow.

 

I tossed a grenade.

 

I think your question would be answered easier by asking "Who all has been denied warranty for having a tune?" Or searching for previous similar threads. If it is an issue then look for a solution.

Personally, I wouldn't worry about it. But, that's me and I may not be the masses.

 

I have messed with this a lot. Did you do it as a replacement PCM saving PCM info or did you install then do as built? Was it put back to stock tune first?

Did you verify part numbers on PCM's prior? A ton of variations. Even a difference from key start to push button start can mess things up.

 

Yea I put it back to stock first. I was thinking the inhale/exhale in IDS would just make it all work and it probably did but I'm not brave enough to mess with the PATS stuff because obviously I want my keys to work in the original PCM (which will be tuned). I know the BCM plays a role in the keys and IDK if my key will work in both PCMs or if I'll have to reprogram each time I switch - which may be never if I don't have a warranty issue. I see why everyone says just don't worry about it...

 

Did you ever get a solution to this?
I’m having BMS issues and my troubleshooting is leading to me needing a new PCM found a similar one for cheap.