I learned on this forum a while back that Canadian X1's don't have tire pressure monitors. We have FTM or flat tire monitoring, which, according to the manual, "detects a pressure loss in a tire by comparing the rotational speeds of the individual wheels while moving". No need to mess with code. I am happy to say that I haven't had any first hand experience with FTM and can't vouch for it's effectiveness.
Here's the thread where I found that info.
http://e84.xbimmers.com/forums/showthread.php?t=601483