tire pressure light

[mistyrbeaird]

:helpI have run flat tires on my bmw 328i I have checked all pressure in each tire and it is correct but my warning light will not go off. Each time I try to reset it it says low tire and will not reset.

[martintech]

Reinitialze the system. Do the reset procedure twice in a row, and wait for the light to change colors. It should eventually go off if you hold don the button long enough.

E90 cars can be trickier, but the owners manual spells it out nicely.

[Cliche Guevara]

There are a couple things that could be going on. Sometimes with sensors you need to scan them using a specific tool as a part of a more thorough reset procedure to get the light to turn off. Most all tire shops will have a scan tool and will do it for free.

Also, some of the first BMWs with TPMS didn't actually measure the tire pressure directly, but rather the rolling resistance of each tire through monitors in the suspension. If you have one oddball tire or one tire that's a different size that could set it off. In that case, the only way to get that light off is to replace the tire.

Also, sometimes your car will need to be driven for a while to complete the reset procedure. If you're just hitting the reset button, but haven't actually driven anywhere on it then that could be your problem. If that's the case, you driving for about five minutes above 20 mph that should do the trick.