Originally Posted by 46er
EVIC is showing tire pressures of 41 for each tire. Measured with a good pressure gauge it shows 36, which is at it should be. Can these sensors be calibrated? GC is 4 months old.
Nope, no adjustment...they are known to be inaccurate, but in a fairly consistent way. I have a true, calibrated Morosa racing gauge and all my TPMS readings are 2 lbs higher than actual. So I just keep EVIC numbers at 38 cold.
5lb off is not normal and since all 4 are 5lb off the first suspect is your "good" gauge. A truly accurate one is very hard to find. They are $70+ for truly good ones. Hit the dealer and have them set pressure to, say 40 if you got em nice and hot driving there, then right there on the spot (don't wait to get home) use your gauge to read the pressure. Assume theirs is accurate and yours is not. Use the "error" of your gauge as your offset guide. I bet your gauge will read 3lbs high.
It's the only way to establish a way to live with known inaccurate gauges and TPMS sensors.