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TPMS
I have one sensor that is giving me a false indication (6 PSI out). I have checked the sensor relative to two other manual air gauges. Is this an indication that the sensor is aging out?
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6 Replies
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What TPMS do you have?
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Pressure Pro Pulse. The install was done in April 2014.
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Tom is the expert and it is his opinion on this that counts.
But as a new owner of a Pulse I did the set up according to the Pressure Pro procedure. I used a digital pressure gauge that I knew to be accurate. Since I initially did not trust the TPMS I would do a pre-trip inspection the old fashioned way by checking with the gauge and then comparing the readings to the PP readings.
The bottom line is if your PP readings are consistent with the readings on all wheels except one the problem lies with the sensor or valve stem extension. When I had a reading on one wheel that was lower than it should have been I checked it with the pressure gauge and found the actual pressure was OK, but after investigation learned the valve stem extension was not allowing the actual tire pressure to be measured by the sensor.
Before you replace sensors just verify the valve stem extensions if used are not the problem. Obviously if there is no extension at the wheel in question the sensor could be the problem.
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Allan,
Good advice from Jon, especially the part about extensions. The sensor is not aging out and the battery should last 5+ years. If there was a battery problem you would get an indication on the monitor. Has this just started to happen or has this sensor been 6 lbs. off from the beginning? It’s not unusual to see a pound or two in relation to manual gauges, but 6 is not normal. Suggest deleting the position and swap out with another sensor and see if you have the same results. What tire position is this sensor on?
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The tire position is the outer drive (left side). There is a flexible valve extension at this location. The TPMS sensors reads a higher pressure (+6 PSI). I swapped with another sensor and got the same reading. So the sensor reads higher than my two manual air gauges only for this particular tire. I can live with this but I am now thinking of removing the extension…….not sure why it was installed in the first place.
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I have a variety of manual gauges and two electronic digital gauges. My primary gauge is part of a valve assembly that when I squeeze the handle the tire fills with air, and when I let go I read the tire pressure. It was from Griots Garage (https://www.griotsgarage.com/search.do?query=tire+air+pressure+gauge) and is the one on the left.
My digital gauges are within 1 PSI or right on what the Pulse shows, but the other gauges are all over the place and quite inaccurate. They are better than a poke in the eye with a sharp stick, but not by much.
Regardless I now have complete trust in the PP readings because I have compared my gauges to the PP readings so often and found them always in agreement What matters is that you set tire pressures to a known accurate reading, then set the PP so it knows the desired reading, set the alerts and trust it. But in your case follow what Tom said to determine the problem.
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