Tpms problem

I got new tires and now my tpms system light is on. I had the tire shop reset the system. The tpms scanner shows that the left rear tire pressure to be 78psi but the tire has 35psi in it. They says (tire shop) the sensor is bad but they didn't damage it. They said either the battery is low or the sensor pressure is stuck on 78psi. I did have my tire up to 78psi at one time. So without making it a big deal, I'm looking to replace the sensor. Where is the best place to buy a new sensor or used? I have offroad wheels so I need the 20 degree ones. Does it matter mixing non OEM with OEM? Any brands I should stay away from?

 

just buy a used one on ebay $18

 

78 psi sounds like too much air.

 

I had load range E's. The take 80psi max. I had 1100 lbs in the bed and pulling a 2500lb trailer. I was trying to get the tires up to 72psi...
The tire shop reset tpms system two times. They deflated the tire and remove the sensor and installed it again. Also they tried to put another sensor in but it didn't work.
Is there a way to rebuild or replace the batteries in the OEM sensors? I was told they need to be replaced every five to seven years.

 

Still too much pressure for that weight. 45-55 would be plenty, depending on the size of those E's. I suspect the high pressure is what damaged the sensor. A bit odd it seemed OK until the new tires though. Stupid question, you checked the pressure in the spare, right?

 

Yes, I had the tire shop replace the spare with correct size tire to match the others.
I didn't like the E tires. They were to stiff or to spongy. I got rid of them and bought some D range. The last 2 years my tpms system was not coded because the tire shops didn't have a way to reset them. Now some of the shops have a computer that can re-code the system. I wasn't going to pay the Toyota dealer $150 re-code the system. I hope the C rated tires will work for my application.

 

Have you actually tried the reset procedure in the owners manual?

 

Every 5 years you should replace the batteries in the sensors (similar to your smoke detector) they don't last forever.

 

honestly it's easier to just live with the light and check your tires regularly when you cant figure it out as opposed to spending hours at tire shops and spending money you don't have to IMO.
<--- what this guy has been doing for nearly two years.