I have 3 tire pressure gauges; A Snap-on/Blue-point, a Jaco, and a Motion-Pro. All three are considered excellent quality gauges ranging in accuracy from +\-.25% to +\-.5%.
I fill my tires (Hankook Evo AS 18” 235/45s) to 42 PSI according to all three guages, which have always agreed with one another, and yet my Tesla TPMS sensors read 46/47 PSI. Literature has said the Tesla OEM TPMS sensors are accurate to +\-1.5% (Which is “decent” accuracy), but the difference between my guages and the sensors are around 7%! and that’s pretty significant.
From a “practical” standpoint, this is really a non-issue and more a nuisance than anything else, because I always use my manual gauges for tire filling accuracy, and rely on my TPMS sensors for monitoring and early warning; I look to the TPMS guages for change rather than accurate pressure reading. In fact, I wish they had a “normalize” mode for the tire pressure readout where they just show an arrow indicator under a centerline for each wheel to indicate change from baseline, rather than an explicit number.
I guess the point of my post is to see if this pretty large inaccuracy is typical with all Tesla owners, and if by some miraculous way, I’ve missed information on how to input an offset to the TPMS reading to calibrate it to a different baseline pressure reading.
Thanks!
I fill my tires (Hankook Evo AS 18” 235/45s) to 42 PSI according to all three guages, which have always agreed with one another, and yet my Tesla TPMS sensors read 46/47 PSI. Literature has said the Tesla OEM TPMS sensors are accurate to +\-1.5% (Which is “decent” accuracy), but the difference between my guages and the sensors are around 7%! and that’s pretty significant.
From a “practical” standpoint, this is really a non-issue and more a nuisance than anything else, because I always use my manual gauges for tire filling accuracy, and rely on my TPMS sensors for monitoring and early warning; I look to the TPMS guages for change rather than accurate pressure reading. In fact, I wish they had a “normalize” mode for the tire pressure readout where they just show an arrow indicator under a centerline for each wheel to indicate change from baseline, rather than an explicit number.
I guess the point of my post is to see if this pretty large inaccuracy is typical with all Tesla owners, and if by some miraculous way, I’ve missed information on how to input an offset to the TPMS reading to calibrate it to a different baseline pressure reading.
Thanks!