TPMS, any hope?

rockusaf · October 24, 2022

Just got new wheels (Cooper Discoverer AT3 4S, stock 275-55-20) installed at Sam's Club and the right front at first said 1 psi and the guy said it'll take 15-20 minutes for it to relearn. Since the other 3 tires were 39, 37, and 51 I figured they had checked pressure before they put them on the truck. Being so far off I gave the guy the benefit of the doubt and drove around for a while and each pressure raised a couple PSI like normal when they heated up from driving but the right front went to .. so I assume it is not reading. After the guy tried the relearn with their tool once again, they said to come back on Thursday because that's when their senior tech would be in. Is there any chance this sensor is not just dead or should I just start searching for new TPMS sensors?

Thanks for reading,

Rock

MikeBMW · October 24, 2022

If the TPMS sensor is bad you'll get no reading at all.
If the TPMS system has been relearned properly, the readings will be correct from the start.
More likely, your TPMS system has a stored code which needs to be cleared with a scan tool hooked to the OBD2 connector.
Happened to me when I went over railroad tracks a bit hard a few weeks ago - TPMS said there was an error on the dash light but the pressure was right on the sensor supposedly not sending.
I got out my AuTel MaxiSys and reset the codes which fixed the issue.
I figure the TPMS sensor got a jolt and lost connection for a millisecond or so thereby setting the code.
It's worth going back to see if they can get it sorted.
I've needed one new sensor, so far, since 2017 as I couldn't get one to relearn and it was determined to be bad - most likely a dead battery on the sensor.

Edited October 24, 2022 by MikeBMW

rockusaf · October 25, 2022

Thanks Mike, I don't have a lot of faith that those guys will be able to clear codes, or even know that may be the problem, but I'll see what the guy says Thursday morning. Really not happy that they let the truck go out with the pressures so far off, I can see an lb, maybe 2, but 13 lbs over is a bit much. I will give an update after I go back.

Rock

rockusaf · October 27, 2022

Well I took it in this morning, they tried the relearn and didn't work again so they took it in as a flat so they could check it out. The guy was really cool and seemed to actually know his ******. Turns out they snapped the TPMS sensor when they remounted the new tire, glad they admitted it instead of just telling me it was not anything they did. Luckily they had one that was compatible with the truck and swapped it out at no charge. Very happy with their service and the new tires.

Rock

MikeBMW · October 28, 2022

8 hours ago, rockusaf said:

Well I took it in this morning, they tried the relearn and didn't work again so they took it in as a flat so they could check it out. The guy was really cool and seemed to actually know his ******. Turns out they snapped the TPMS sensor when they remounted the new tire, glad they admitted it instead of just telling me it was not anything they did. Luckily they had one that was compatible with the truck and swapped it out at no charge. Very happy with their service and the new tires.

Rock

Thanks for the update, Rock, glad you got it sorted!