No communication on chipped trucks

Fordracer · July 25, 2016

In the last 2 weeks I've had 2 modified 6.7's with deletes and tunes that the IDS wouldn't recognize. It said something about PCM identifier not recognized or something like that , I wish I had

wrote it down. It wanted you to manually input the VIN but it wouldn't recognize it either. Then

it wants to install as built data.

I wonder if this is something they did in the 101 update so we can't work on chipped trucks or if certain brands cause this to happen because I never had this problem before.

Has anybody else ran into this?

lmorris · July 25, 2016

I have seen a "Custom" written tune do this but not one done by the usual suspects. Our OTC scan tool wouldn't read it either. In the end we had the owner put it back to stock, we diagnosed and fixed the issue, then had the customer put the tune back in.

Matt Saunoras · July 25, 2016

I have seen one do that. Pulled it in for a 14E03 recall, wouldn't recognize the PCM so I stuck it back outside. The guy who owned it didn't know anything about it but at the same time declined the free reflash. Didn't want it effecting whatver fuel mileage he was already getting