P1622 Code Immobilizer ID Does Not Match

[14ram5.7]

Any idea as to what this code means or whats causing it?

 

[darthdzl]

To oversimplify: every key has a little circuit in it, and that circuit is unique for each key. The truck's computer is programmed at the factory to recognize the keys you're given.

If the truck's computer doesn't recognize the ID that's encoded into the key's circuit, it pops that code. There may be other reasons why the code would show up, but I dunno if any apply to our trucks or not.

So theoretically (especially if that key won't start your truck), the computer doesn't recognize it. Either something happened to the computer or the key, or that's an aftermarket key that hasn't been programmed into the computer by a dealer yet.

EDIT: If you're not having a problem starting the truck, then maybe they've extended the immobilizer system for other stuff. Some companies do (*coughVWcough*).

 

[14ram5.7]

Well my truck didn't come with remote start so I had the factory mopar one installed at the dealer. They gave me 2 new keys with the remote start button and I've been using the same key ever since. This was almost a year ago not sure why this code suddenly appeared.

 

[Gymkata]

I got the code you are mentioning one time about 2 weeks ago. I have ARH long tube headers, and where the mid pipe crosses below the transmission it drops 4 inches below the cross member. A week before getting the code you are talking about I got P0420 and P0430. Both times I looked up the meaning of the code then cleared it with my tuner and they never came back. Both times the check engine light came on while I was driving in deep snow and the snow was caking on the exhaust portion hanging below the cross member (which is also where a sensor is). I don't know if this is any help to you, but I thought I would post it somewhere since this issue was frustrating for me in I'm pretty sure it is the result of the ARH headers dropping ridiculously below the cross member and getting caked with crud. In the next few days I am going to play around with the mid pipe and see if I get change the angles to pull it up a bit. The only issue is the bottom pan of the 8 speed transmissions is plastic (REALLY!!!) so the exhaust can't get too close to it. I need to find out if there is an aftermarket metal pan I can purchase.

BTW, my truck has remote start & keyless entry.

 

[14ram5.7]

I have stainless works long tubes so maybe this is an issue with headers? I cleared it and it hasn't come back on so well see. Yes mag hytech makes transmission pans that are metal...ill be buying one soon

 

[darthdzl]

Sometimes, if I stick the key in and turn it immediately, my EVIC says "Wrong key fob" for an instant before it goes away and the truck starts. It's done this since I bought it.

Not sure if that's the source of the code or not. I've never have a MIL, so I dunno if that's one of the codes that sets it or not, or if it just kinda hangs around in memory until cleared without raising a stink.

But that's one possibility: the computer not reading the key fast enough. I'll have to ask the dealer to pull codes next time I go in and see if there's one in there. I know it did it to me last night once, so if it does, there'll be one waiting.