TPMS measuring incorrect PSI

ekinnyc · 08-19-2015, 04:56 PM

had the low pressure warning go off for all 4 tires over the weekend. TPMS was reporting 31PSI cold. figured let me warm them up a bit, eventually PSI went to 33.

the door says it should be 32 all around, which i figure is roughly 34 warm. odd thing is, when i got out my trusty PSI gauge (the old school analog one), i was getting 34-35 when warm on each wheel.

tried resetting TPMS, now it shows 31-32 warm

any thoughts on the matter? i figured i will leave it for now, and measure again when the wheels are cold. i could understand one tire with a slow leak, but all 4? AFAIK i didnt drive over any spike strips

Dang3r · 08-20-2015, 06:18 AM

You could try to fill all four tires to the given pressure as long as they're cold. Than reset the values and go ahead drive a short round. After that the sensors should transmit the correct value IMO.

08-19-2015, 04:56 PM	#1
ekinnyc Private 12 Rep 51 Posts Drives: '15 328xi Join Date: Dec 2014 Location: NYC iTrader: (0) Garage List 2015 BMW 328xi [0.00]	TPMS measuring incorrect PSI had the low pressure warning go off for all 4 tires over the weekend. TPMS was reporting 31PSI cold. figured let me warm them up a bit, eventually PSI went to 33. the door says it should be 32 all around, which i figure is roughly 34 warm. odd thing is, when i got out my trusty PSI gauge (the old school analog one), i was getting 34-35 when warm on each wheel. tried resetting TPMS, now it shows 31-32 warm any thoughts on the matter? i figured i will leave it for now, and measure again when the wheels are cold. i could understand one tire with a slow leak, but all 4? AFAIK i didnt drive over any spike strips __________________ '15 Mineral Grey F30 328xi
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08-20-2015, 06:18 AM	#2
Dang3r Schmollbraten 12512 Rep 1,985 Posts Drives: M4CPC // HP4 Comp. Join Date: Jun 2015 Location: Liandri Central Core iTrader: (0)	You could try to fill all four tires to the given pressure as long as they're cold. Than reset the values and go ahead drive a short round. After that the sensors should transmit the correct value IMO. __________________ Citizen of ///M - Town, where too much is just right Some say, that my scrotum has its own small gravity field and when Im slowing down that brake lights come on at my buttox
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