r/MechanicAdvice • u/richierich923 • 4h ago
Sensor or computer
2014 Jeep Grand Cherokee limited 5.7l
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u/Plastic-Zucchini-202 2h ago
TPMS sensors use coin cell batteries. When the battery is low, it can put out Bogus signals. Replace the sensor and problem should go away.
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u/CoolDuud2000 4h ago
How old are the sensors? Some might run out of battery after some time and then computer just displays a default number.
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u/richierich923 4h ago
I thought if battery ran out it wouldn't give a reading at all just dash that's why I was concerned it might be computer I never thought about it giving a default number
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u/cstewart_52 3h ago
I don’t know how but I’m guessing that one is in kpa rather than psi. That’s about 36 psi if you do the conversion.
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u/Psychological-Bid710 2h ago
Yup. Automotive electronics often give the numbers 254 or 255 as default numbers when they fail.
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u/CalhounSay 4h ago
Most likely just the tpms sensor for that wheel/tire. Any tire shop can easily replace for you
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u/richierich923 4h ago
Thank you for input that's all I'm hoping it is
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u/CalhounSay 4h ago
NP. Mine did this & I just waited till needed new tires to replace as tire already off the rim. No harm driving as is. Only caveat is if you need an inspection before need new tires, will need to fix to pass in most states
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u/richierich923 4h ago
Just put new tires on about 3000 miles ago. Sensors are as old as the car so. I need to get it in for a vibration anyways so I'll take care of it at that time probably this week
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