TPS accuracy

Does anyone know the +/- on sensor accuracy? Accurate within a pound? 2? Reason I ask is the high quality Longacre pressure gauge I use on my compressor never agrees with the TPS reading. Also wondering what triggers low pressure alerts. Is it absolute pressure or a delta between tire pressures? I know someone will tell me to read the F'n manual...probably deserved.

Mine are usuallywithin 1 to 2 of my gauges. I have run 32 on the street with no alert. Someone her mention in one of the tire pressure thread when it comes on? I think it was 29 or less. I understand its actual pressure not delta.

saym14 said:

Mine are usuallywithin 1 to 2 of my gauges. I have run 32 on the street with no alert. Someone her mention in one of the tire pressure thread when it comes on? I think it was 29 or less. I understand its actual pressure not delta.

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+1. My TPMS sensors are all just a little off my “known good gauge” and of course, they couldn’t all be off the same direction, so sometimes my truck pressures show a psi different and I’m sure they’re actually fine.

Actually I’d bet the sensors are less than 1 PSI off my known good gauge but because LR may be a bit low, RR may be a bit high, etc. they can read a little bit different. They have been consistent though all the times I’ve checked.

Mine are only off by a pound or so sometimes. Sometimes they are dead nuts on, so they are pretty close to being right.

Mine run two pounds high compared to my gauge. I just use it to make sure tire pressure is where I want it.

I read somewhere and it may have even been in the Owners Manual, that the TPMS Alerts at a loss of either 20 or 25% of recommended pressure. My '19 Raptor says 38 psi and mine alert at about 28 to 29 psi.

Whats the best PSI for daily driving? current is 36-38 for me. Thanks

Reverse it. 38-36

TrewRaptor said:

Whats the best PSI for daily driving? current is 36-38 for me. Thanks

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I'm at 36 front, 32 rear, unless I need to carry a load, which is almost never. If you are running an empty, or near empty bed you want a little more in your fronts because there is a lot more weight being carried by the fronts, unless you have a load in the bed.

He said load... hehe.