Air pressure sensors


#1

I would like to see (and hear) how many of you think these sensors are reliable?


#2

My 4 runner air pressure sensor has been totally reliable until I switch steel wheels in the winter…then I live with the idiot light until spring. It monitors the spare to a fault.


#3

In my experience, they have been correct about a low tire. They work off of the ABS system by detecting a wheel turning more times than the others. A miss matched set of tires will also trigger the light. I suppose if the tires were all uniformly low, the system wouldn’t trigger the light.


#4

Thanks.


#5

They are reilable, but only to a degree. Do they warn you when you forget to check your tire pressure and it drops 5 PSI? No. Do they point out when there is a big loss of pressure that could cuase an accident? Yes. So even if they are reliable, you still need to check your tire pressure regularly.


#6

the ones that work off the ABS system by measuring differential rotation rates are very reliable. Why? because they are just software and a panel light!

Are they accurate? that is another question! I can’t see how the ABS type can be. The tires could have slightly different diameters, which will cause errors in the readings. Also, they measure differential pressure, so if all 4 tires are low, the system will not detect that.

Re the transponder type that use RF to carry signals from the tires to the computer, don’t know.