I had the problem few days ago related to TPMS, the warning LED appear in dashboard as shown below.
Ok, so I think it just a small problem and computer system in cadillac telling the air pressure is in minimum value. The worst scenario I thought was something like nail hitting the tire, but the pressure not decreased a lot so I just bring the car to woqod. The indicator light clearly shown right-side of front tire, the pressure for that part is 25. The garage guy put air pressure to 35 as instructed on the cadillac doors. However, when I restart the machine the light indicator still showing that part of tire is still having low air pressure. I asked him to check the other left-side of front tire and he said the pressure was 30, then I simply told him to make the right-side as 30 as well. Light still coming, the very first come to mind was sensor broken.
I don’t like dealing with mannai, the process would take looong time here in Qatar since queue is full everyday. The same answer when I called one of the mannai guy, he said if I bring the car there then it would take at least one day to check so I have to leave the car on garage.
I tried to read again the manual book of cadillac srx4 at home, and finally find something interesting. The thing was, before I left to saudi for omra few months ago, I rotoate the car’s tire. According to manual book, whenever we rotate the tire then we should reactivate the learning system of TPMS. In summary, because I rotated the tire then indicator shown in TPMS is not for the correct tire.
As written on the book, by following the instruction cadillac will reactivate the learning system to set sensor from each tire in TPMS. The process was quite easy. So I go again to woqod and follow as per instruction for all the tire. After that turn-off the machine and set all tire pressure is set to 35, then start the machine.
Voila. The light indicator disappear and TPMS back to normal (240 Kpa ~ 35 ).