ecobb993

Does anyone else experience the constant Low Tire Pressure warning? I reset by switching tire type/size momentarily to get it to re read, then it reads correctly, but next startup or two it's back to showing the warning light. Maybe bad sending units or batteries? My car is a 2013 so now 5 years old. Tires were replaced a couple years ago but didn't pay any attention to the pressure sending units; mistake?

HenryPcar

If it is always the same tire/wheel showing, then I would say it is the sensor that needs to be replaced.

ecobb993

Seems like only the rears randomly, but I'll watch. Are there batteries that can be replaced? Or the whole units? Hoping it's just a matter of popping the bead to replace; maybe a rebalance?

HenryPcar

The unit is sealed. The entire sensor has to be replaced. Might as well rebalance the wheel/tire combo afterwards.

tanner1974

I have a similar issue on the left rear. Read that the system needs to be "reset" which could be done by changing the tire setting to winters, let it run on that for a while, then switch it back to summer. Worked well, then it went back to it's old self where it keeps on saying it's -4 below on but the pressure reading is right.

Scooby921

Are your pressures proper and it's falsely flagging them as low, or are they actually low? When I'm at the track I have the tires at 26psi cold and the TPMS warns me at the start of every session. If I do a re-learn on the way to grid it goes away for the session, but at some point it warns me again because it's just too low. At the end of the day when I put them back to 32psi and re-learn again it's happy until my next track day.

tanner1974

Right now all four tires are at 32psi and confirmed with a gauge. All four shows as 32psi according to the TPMS but it still thinks the left rear needs an additional 4psi.

MrMoose