: TPMS dead...and backwards?



fre1102
06-04-12, 09:33 AM
So on my new 2006 V, the TPMS display shows the passenger front tire as dead--the display for it just says "--". The other three are about 35. The previous owner says the car has run-flat tires, so my first thought was to test and see if the tire really was flat. I put air in it, and the driver's front display number jumped to 48 and starting blinking--I assume to warn me it was overinflated. I let some air out of the passenger front, and the display for the driver's front went back to normal.

I then put air in the driver's front tire, and display did not change at all.

So I'm assuming the TPMS in the driver's front wheel is dead, and somehow...they're reversed?

Anyone know how difficult it is to swap a TPMS, and has anyone ever heard of the sensor inputs being switched?

Thanks.

howanicm
06-04-12, 03:30 PM
My car did the same thing. I had one dead sensor so i swapped it with a good one which was not the correct sensor. I have never rotated my tires in because i was worried the tpms would get screwed up. It worked fine when i got the car and now i cant turn.off stability control. Im about to sat F it and just take em out. Only thing is u meed to debead the tire to remove them. I was thinking about taking a very small drill and trying to drill them til i hit the battery but didnt know how that would work. If you find anything out keep me posted...

jwilson2598
06-04-12, 03:53 PM
If they're reversed, then someone probably did a tire rotation and didn't reset the sensor locations. There's a procedure for doing that here:

http://www.cadillacfaq.com/faq/index.html

As for the dead sensor, you could try the reprogram and see if it comes back, maybe it will. If it's truely dead, you might have to adjust the pressures on the tires to figure out which sensor it is. Then replace the sensor and try the above procedure. Replacing a sensor will require taking the tire off the rim, so easiest would be to get the dealership to do it.

fre1102
06-04-12, 04:44 PM
If they're reversed, then someone probably did a tire rotation and didn't reset the sensor locations. There's a procedure for doing that here:

http://www.cadillacfaq.com/faq/index.html

As for the dead sensor, you could try the reprogram and see if it comes back, maybe it will. If it's truely dead, you might have to adjust the pressures on the tires to figure out which sensor it is. Then replace the sensor and try the above procedure. Replacing a sensor will require taking the tire off the rim, so easiest would be to get the dealership to do it.

Thanks man. This list is turning out to be really helpful. Now on to the exhaust and shocks--the seller said his friend has removed the mufflers from the car, and it sounds like it. Far too loud and attention-grabbing for me, and the car rides just...bad. Expansion joints are hell. Time to search the performance section I think.

Heh. And it needs some forced induction. Heh.

Cadillac Cust Svc
06-05-12, 11:18 AM
Hi fre1102,

I'm really sorry to hear about your tire/TPMS frustration! " " indicates that your system detects a missing or inoperable sensor (see page 5-71 of your owners manual for details). If you have replaced a tire and wheel assembly without transferring the TPMS sensors, this error message will be displayed. Once you re-install the TPMS sensors, this error message should go off. Your manual (and I!) recommend visiting your Cadillac dealership for service if all TPMS sensors are installed and the error message comes on and stays on. Would you consider going to a dealership? I realize many people on this forum prefer a DIY approach, and I can appreciate that.

Please let me know if you'd like me to investigate further on your behalf; my email is Katie_Lucille@gmexpert.com.

Best,

Katie
Cadillac Customer Service