TPMS, UConnect app reads insanely high

RobTeazy

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First Name
Rob
Joined
Jul 6, 2020
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Location
Farmington UT
Vehicle(s)
2019 Volvo XC40, 2021 Jeep Wrangler Rubicon
New wheels and tires installed, and left rear doesn't show up on the Jeep itself. I have rotated tires several times, and it's always the left rear that is not showing. I went to the dealer to schedule an appointment for recalibrating my speedo for the 37" tires. While I was there, I opened up the UConnect app and notice left rear at 255psi. I know this is not accurate because I have checked them all, and even rotated all the tires (Spare included). I am curious if recalibrating the speedometer for the larger tires will help. Has anybody come across anything similar, and if so, what fixed it?

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Jeepney Johnny

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Rico!
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SoCal
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2020 Jeep Wrangler Sahara
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If it's always the left rear after rotating the tires, that suggests the TPMS sensors in the wheels are fine and one of the receivers is broken, no?

Sorry, can't pinpoint where the receivers are, I've never looked for them, but this thread has a photo of what to look for: https://www.jlwranglerforums.com/forum/threads/broken-tpms-receiver-sensor-wheres-it-located.56385/

It's interesting to me that the number 255 shows up, because that could be indicative of some hardware error, where all the bits that represent that value in the firmware are errantly lit.
 

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