Quote Originally Posted by Explicit_Spade View Post
What would happen if the TPMS module were removed?

In theory, The dic would think that there wasn't a TPMS to begin with and may not bother with throwingthe code anymore. You may have to reset the battery by removing the terminals for half an hour or so.

If it still comes up after that, try going to a dealer and explaining that you want them to disable your TPMS completely using a tech 2 and if they are a good dealer, they will do it for no more than a 1 hour rate, still leaving you up $100 from what buying 4 sensors would be.
Considering his car doesn't actually have the TPMS module required for the sensors (because it's an 04 with an 07 DIC -- unless it's built into the DIC, which I doubt) one would think that this IS the case of what would happen if the TPMS module were removed, thus the error telling him to service the tire monitoring system. If it just thought the tires were low it would throw a message saying low tire pressure.

So at the end of the day I vote for recording the mileage at which the engine was swapped and proceeding normally with the old DIC. Easiest way, and should only take 5 minutes.