We have a 2015 Fit with almost 100k miles. In the past 3 months or so, the tire pressure light goes on about every 2 weeks. We check the tires and one is always a few pounds low, but it's always a different tire. We put a few pounds in the low tire, reset the light and drive on. I thought that light wasn't supposed to come on until the tire pressure was much lower. We took it into the shop for another issue (brakes) and the technician said diagnostics did not show a "problem" with the Tire pressure sensor. But it seems to be a problem to us. Anyone else deal with this problem? Thanks!

(Bear in mind we live in a town with lots of potholes. )

 

Happens to my Fit after I check the air pressure and inflate the tires when needed.

I always put in 40 pounds of pressure to compensate for normal deflation.

I just re-set the tire warning light and drive.

I check my tire pressure every few weeks.

 

Could be that the battery in one or more of the TPMS sensors is close to being done.

 

1) No Tire Pressure Sensors - Third gen Fits (2015 to 2020) have indirect TPMS that uses wheel speed to calculate tire pressure and do **NOT** any tire pressure sensors in the wheels. Adjust ALL tire pressure to the cold spec on door jam if the vehicle hasn't been driven yet (Or if the tires are hot from driving, go 2 to 3 PSI above cold pressure), initialize/reset the TPMS system after pressure is set then drive the vehicle.

2) False Low Pressure Triggers - If you have a mixed set of tires be it sizing, tire models, or of a different production batch... They can cause a false low tire light to set. Wheel alignment being out of spec enough can trigger false low pressure warnings due to the tire dragging/slowing across the road surface. In addition to that, excess road force values (hard spots in tire compound, bends in wheel, etc) in the wheel/tire assembly itself can trigger false warnings as well. Finally, having a tread depth difference of 3/32nds or more can between tires can allow the system to see enough of a wheel speed different to cast a low pressure warning.

3) TPMS Hard Reset/Data Clear - If you recently replaced all 4 tires and are having issues with false low tire lights. You'll need to clear the learned data from the old tires that is still stored in the system. Fire the car up and give it about 5 to 10 seconds to settle. Activate the TPMS initialization/calibration function... you should see the low tire light flash then disappear. Wait 5 seconds and do it again. After completing this procedure **a total of three times**, you'll see the low tire light hold solid for about a second then disappear. This indicates that the old tire data has been cleared and the vehicle is ready to learn that specific set of tires from that point forward. At which point I'd recommend taking a short drive (a couple minutes so maybe around the block once or twice) for the system to see wheel speed and acquire data before shutting the vehicle off again.

 

"...a town with lots of potholes." In other words, a town with roads. 😁

If the tires are losing air, there's a problem with the tires. We had one tire always losing air, but since we were getting new tires, I didn't bother checking it. The right amount of air pressure in tires is very important.

 

The TPMS is much easier to reset than on the newer models with the controls on the steering wheel.