Author Topic: TPS Reading  (Read 1155 times)

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Offline Debs

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TPS Reading
« on: November 06, 2015, 12:13:57 am »
I checked my tyres yesterday and needed to put a bit more air in them.. I always use the pen type tyre pressure gauge as I have always found it to be accurate. After getting the pressures to exactly 42 psi I was happy.

BUT

Has anyone noticed that the TPS read higher (44psi) than to the good old fashioned gauge?

Now the question is... Do I stick with what I have always been happy with OR do I go by the TPS monitor on the dash and let some air out? Hmmmm

This is my gauge I use..
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Offline Harry Martin

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Re: TPS Reading
« Reply #1 on: November 06, 2015, 12:35:47 am »
Now the question is... Do I stick with what I have always been happy with OR do I go by the TPS monitor on the dash and let some air out? Hmmmm

From what I have read from several websites, always trust your pressure gauge, not the TPS. The whole purpose of the TPS is NOT accurate tire pressure, but to warn you of impending tire failure. A sudden drop in tire pressure should alert you to pull over BEFORE a major blow out. Mine is the same way, about 2 PSI difference. I just make a mental note of it and if I see a sudden change in the TPS reading, I'm stopping to check it out.   :)
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Offline Debs

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Re: TPS Reading
« Reply #2 on: November 06, 2015, 12:59:55 am »
Now the question is... Do I stick with what I have always been happy with OR do I go by the TPS monitor on the dash and let some air out? Hmmmm

From what I have read from several websites, always trust your pressure gauge, not the TPS. The whole purpose of the TPS is NOT accurate tire pressure, but to warn you of impending tire failure. A sudden drop in tire pressure should alert you to pull over BEFORE a major blow out. Mine is the same way, about 2 PSI difference. I just make a mental note of it and if I see a sudden change in the TPS reading, I'm stopping to check it out.   :)

Awesome.. Thanks Harry  :)
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Offline jwh20

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Re: TPS Reading
« Reply #3 on: November 06, 2015, 10:13:00 am »
I also run 42 psi in my tires as measured by an actual tire pressure gauge.  The TPS sensors report that at 44-45 psi.  I believe the gauge is correct and the TPS sensors are incorrect. 
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Offline Fred_Harmon_TX

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Re: TPS Reading
« Reply #4 on: November 06, 2015, 01:27:33 pm »
Pencil type gauges are the least accurate gauge made.  You need a better tire pressure gauge for starters. Personally, I prefer good quality digital ones.

The TPMS values displayed on your LCD are temperature compensated, and as such will never be quite as accurate as taking an actual pressure reading with a good quality gauge. The temperature at which you take the measurement can also impact how close the two readings match. The TPMS sensors are calibrated at about 65 degrees ambient, so if you set your tire pressures at close to that temperature, the reading from your TPMS sensors and your hand held gauge will match better.
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Offline Debs

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Re: TPS Reading
« Reply #5 on: November 06, 2015, 07:59:12 pm »
What type of gauge would you recommend Fred?
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Offline Harry Martin

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Re: TPS Reading
« Reply #6 on: November 06, 2015, 09:27:28 pm »
This is my current favorite digital gauge. Accurate to 1/10 PSI.
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Offline 4Bikes

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Re: TPS Reading
« Reply #7 on: November 06, 2015, 10:42:24 pm »
Check out this thread. It has a link to a very accurate Stockton gauge and the IMHO, the best way to tend to tire pressure.

http://forum.cog-online.org/index.php?topic=45577.0
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