What's the group's experience with the accuracy of TPMS readings?
10-06-2006, 08:13 PM
#1
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What's the group's experience with the accuracy of TPMS readings?
I'm curious as to what the group's experience is with the accuracy of TPMS readings. I check the tire pressure with cold tires, using a high quality analog pressure guage and get one reading. Then, as soon as I drive a short distance (until the TPMS initially registers), those readings indicate pressures are 3-4 pounds lower than my pressure guage had registered.
All pressures rise when warm, usually the left front tire will be up to 2 pounds higher than the rear tires. It takes a number of miles of driving for the indicated TPMS pressure to reach the initial readings I took using the analog pressure guage.
All pressures rise when warm, usually the left front tire will be up to 2 pounds higher than the rear tires. It takes a number of miles of driving for the indicated TPMS pressure to reach the initial readings I took using the analog pressure guage.
10-06-2006, 09:15 PM
#3
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When cold I've noted anywhere from a 3-6lb difference between an analog pressure guage and what TPMS tells me (TPMS reading the lower). When they warm up they rise up to 7lbs more.
10-06-2006, 10:29 PM
#4
Three Wheelin'
Inaccurate
Two gauges (one analogue & one digital) agree with each other. The TPMS disagrees with both and is inconsistent. Stick with external, hand-held gauges for accurate pressure setting and use TPMS only as a warning of a leak from a particular tire.
10-07-2006, 02:25 AM
#7
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Originally Posted by Le Chef
Two gauges (one analogue & one digital) agree with each other. The TPMS disagrees with both and is inconsistent. Stick with external, hand-held gauges for accurate pressure setting and use TPMS only as a warning of a leak from a particular tire.
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10-07-2006, 08:34 AM
#8
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I've heard that most handheld tire pressure gauges are not accurate, and tend to show 2 to 3 psi lower than the actual pressure. I set the tire pressure at 39 front 46 rear on my hand held, and the tpms shows 37 front and 44 in rear. Not sure which is more accurate, but I am of the view you are better off overinflating by a couple of psi than underinflating. Anyone know if there is a handheld gauge that is recognized as being accurate?
10-07-2006, 02:53 PM
#12
I dont consider it accurate at all. I dont think the point is spot on accuracy, more of just a blunt tool to let you know if the pressure is low or if you've had a puncture while driving.
10-07-2006, 03:34 PM
#13
Burning Brakes
Mine's not very accurate, but was very useful when I had a blow-out on the freeway. It was only moments after I felt what I thought was a huge pothole, and even before I could notice that my handling had changed that my TPMS started beeping that I had a flat.
