Tire Pressure Monitor false alarms

[Johntechwriter]

I could find no threads or posts that included the words "Tire Pressure Monitor" so I am creating this thread.

Our 2013 sDrive28i is constantly giving us alerts via its Tire Pressure Monitor, and when we check the alerted tire's pressure, it is always what it should be. Because by law the alert system cannot be turned off, these false alarms have become a major nuisance.

The alerts randomly (it seems) show any one of the four tires in yellow, indicating underinflation of that tire. Because not just one tire gets the alerts, I must rule out a faulty sensor on a specific wheel as the source of the problem.

Usually an alert can be eliminated with a reset of the TPM. But not always. Sometimes we need to add a token amount of air to the alerted tire to get the system to reset.

I suspect the TPM is overly sensitive. Despite our factory Goodyear run-flats being nearly new, with minimal tread wear, and filled with nitrogen to reduce seepage, minor pressure variances are inevitable due to outside temperature fluctuations and the tires getting warmer as the car is driven. These minor variations are supposedly accounted for by the TPM's computer but maybe it is nevertheless oversensitive.

Or, maybe we have a faulty TPM. I'd like to know if other owners have experienced TPM false alerts and if so, how they solved the problem.

Thanks for reading!

[d1saster]

1. Make sure there's no warning displayed. If there is a warning inflate the tire(s) to eliminate it
2. Adjust pressures on all tires per your liking
3. Reset TPMS

[BeEmVe]

It could be something as simple as the batteries needing to replaced.

[kiloTHREE]

Originally Posted by BeEmVe

It could be something as simple as the batteries needing to replaced.

Who makes TPMS that have replaceable batteries?
All the one's I've come across are sealed units.

[BeEmVe]

Originally Posted by kiloTHREE

Who makes TPMS that have replaceable batteries?
All the one's I've come across are sealed units.

Correct, I have never looked at them closely. But they are sealed. Regardless it still stands to reason that the batteries may be on their way out. Thus replacing the batteries mean replacing the TMPS themselves.

[mreric]

how accurate is your tire gauge? how you measure it with a few tire gauges?

and you are following the reset procedure written on the manual?

[0w40X1]

Air up tires before driving with portable cheap compressor.

Reset TPMs.

Drive around..

If you air up and push reset when hot there's no buffer to cold shrinkage.

Most people really have trouble when cooler days come in fall.