TPMS Reading Wrong Tire

[dosborne]

"Tires, wheels, brakes" seems like the correct category to start. I've got 2021 Overland, and have had 35's installed back in May (warm weather). Now it got cold, 2 sensors go off - no problem. Fill them with air (right front and rear). Start the vehicle and it's reading that the left front and rear now have 37 psi, and that the sensors for the right front and rear are the same as they were.

Would this be because the sensors in the wheels are programmed incorrectly? I would just move them to the correct side, but then they would be "out of place" after next rotate.

Any idea what the issue is, or what I could try? Thanks in advance!

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[Rusty PW]

Drive it for a few miles and see if it changed.

 

[Mr._Bill]

There is no programming for the TPMS. The sensors start transmitting after the wheels are moving. The computer figures out where each wheel is located and updates the display. The pressure should be regularly checked on all four wheels. The TPMS is not meant to be relied on for accuracy to just fill individual tires when they get low.

 

[Josh00333]

As said go drive, it take a bit for them to update. Usually 2-3 miles for my truck.

 

[dosborne]

OK, so I've driven it about 10 miles. Nothing changed. It still believes that the pressure is low for both tires on the passenger side, when in fact it is the driver side. I then inflated the tires on the drivers side to about 40, and drove it - within a quarter mile it registered the 40 (on the opposite side, passenger side). I then deflated to 34, only started the engine, and it registered the 34 within a few seconds. But they are reversed.

I suppose I'll reach out to the shop that did the lift and wheel/tire install on Monday. Maybe there is a reversed wire, cable, something...

 

[dosborne]

There is no programming for the TPMS. The sensors start transmitting after the wheels are moving. The computer figures out where each wheel is located and updates the display. The pressure should be regularly checked on all four wheels. The TPMS is not meant to be relied on for accuracy to just fill individual tires when they get low.

I'm definitely not relying on the TPMS, but it is surprisingly accurate in regards to PSI, even before it starts moving. Dead on with my manual gauge. I just wish I could rely on it giving the correct alert for the correct tire.

 

[jeep1]

For what's its worth, I have the same problem .... left and right are reversed. Thought about crawling around underneath and seeing if there is an easy way to reverse the harness .

 

[dosborne]

For what's its worth, I have the same problem .... left and right are reversed. Thought about crawling around underneath and seeing if there is an easy way to reverse the harness .

Let me know what you find out. I've already sent an email to the guys that did my upgrade. They are top-notch, so I'll reply once I find out what they say.

I had an alert once last winter, with the stock wheels/tires and everything was correct. So I think it has something to do with the install/upgrade.

 

[Mr._Bill]

There are supposed to be three receivers for the TPMS sensors. The computer is supposed to figure out which reading is from which wheel based on distance from the receiver. It sounds like a programming glitch if it's reporting them on the wrong side. It could also be an issue with the sensors and the size of the wheels and the increased distance from the receivers.

 

[ShadowsPapa]

As said go drive, it take a bit for them to update. Usually 2-3 miles for my truck.

Wow, mine update before I have gone a mile. Interesting.

For what's its worth, I have the same problem .... left and right are reversed. Thought about crawling around underneath and seeing if there is an easy way to reverse the harness .

Wireless, no harness.

 

[dosborne]

Just an update; I had the tires rotated, and after the rotate they relearned themselves but to the same backwards side-to-side position to what they were prior to the rotate. So driver's side is passenger, and vice-versa.

According to the shop that installed my lift, wheel/tires, it's a simple fix that requires the RFID's to be re-assigned to their physical location. They claim it only takes about 5 min, and is a different relearn process than what the wheels do on their own after a rotate. So, I'm planning to have them do that, hopefully tomorrow, drive around for several days and see what happens. Never heard of re-assigning RFID's....

 

[ShadowsPapa]

Just an update; I had the tires rotated, and after the rotate they relearned themselves but to the same backwards side-to-side position to what they were prior to the rotate. So driver's side is passenger, and vice-versa.

According to the shop that installed my lift, wheel/tires, it's a simple fix that requires the RFID's to be re-assigned to their physical location. They claim it only takes about 5 min, and is a different relearn process than what the wheels do on their own after a rotate. So, I'm planning to have them do that, hopefully tomorrow, drive around for several days and see what happens. Never heard of re-assigning RFID's....

If that was the case you'd have to do that with every single tire rotation.
I could swap wheels around 10 times a day - and it would know what was what.
In fact, twice now I've introduced a 5th sensor into the mix and both trucks picked up the new sensor fine just by installing it.
I had a shop put 4 new sensors in 4 Rubicon wheels and tires I bought for my 2020, slapped 'em on the truck and it read just fine. No programming needed. As soon as the truck left the building it was reading the all new sensors in the wheels.
Every tire swap, every rotation, both times I introduced a matching spare wheel with tpms sensor, the trucks picked them up.
Can't see why or how I can introduce all new sensors to a truck and it simply knows - and yours has to be reprogrammed! That's a new - and weird one.

 

[dosborne]

If that was the case you'd have to do that with every single tire rotation.
I could swap wheels around 10 times a day - and it would know what was what.
In fact, twice now I've introduced a 5th sensor into the mix and both trucks picked up the new sensor fine just by installing it.
I had a shop put 4 new sensors in 4 Rubicon wheels and tires I bought for my 2020, slapped 'em on the truck and it read just fine. No programming needed. As soon as the truck left the building it was reading the all new sensors in the wheels.
Every tire swap, every rotation, both times I introduced a matching spare wheel with tpms sensor, the trucks picked them up.
Can't see why or how I can introduce all new sensors to a truck and it simply knows - and yours has to be reprogrammed! That's a new - and weird one.

Yeah, I agree. That's why I'm curious how this turns out. The way I understand it, is that it is the receiver's location re-assignment, not the TPMS in the wheels. He claimed it's a different process than the wheel relearn. I don't know why that would be either, unless they moved them. I'm willing to go with it, since like yours, my tires relearned as soon as they were rotated (criss-crossing the rear to front, front direct to rear) and they still show up as side to side reversed.

 

[ShadowsPapa]

Yeah, I agree. That's why I'm curious how this turns out. The way I understand it, is that it is the receiver's location re-assignment, not the TPMS in the wheels. He claimed it's a different process than the wheel relearn. I don't know why that would be either, unless they moved them. I'm willing to go with it, since like yours, my tires relearned as soon as they were rotated (criss-crossing the rear to front, front direct to rear) and they still show up as side to side reversed.

Yup - agreed, this will be ..................

 

[Stupidjerkface]

Has this by chance resolved itself? I noticed mine doing the same thing this morning. Rear passenger reads as rear driver and rear driver as passenger.

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