We have a 2005 G35 Coupe, and for the last 6 months or so there has been a very slow leak in the right rear that is manageable. If I don't check the pressure every 2 or 3 weeks, it can drop low enough that the indicator light comes on. When this occurs, the low tire is around 30 psi (where we're inflating to 35 psi cold, as recommended).

For the last couple of weeks, Just a few days after a full check for all 4 tires' pressure, the indicator light will illuminate. I was initially thinking that the leak had accelerated (or we had run over something and punctured one of them), but a check indicates that all is well. The light will go off for a day or so and then come back on.

Has anyone seen this phenomenon? Is there a simple reset procedure? The manual suggests a reset at the dealer in the event of having to use the spare, but that's all they provide.

Thanks very much in advance for any help you all can provide -

B

 

Has the wheather been could where you live?

If so that is your problem the air in the tire loses pressure from the cold air when it is cold outside but it gains back to normal after driving for a while.Very common problem on all vehicles with TPMS equipped...

Just think of Science!!

 

No, but this is a very good consideration (I'm also a big fan of thermodynamics). While we do drive at altitude and/or in cold temperatures sometimes, these latest episodes have been at sea level and where the lowest of the 4 room temp tire pressures is about 33 psi, and it hasn't gotten any colder than maybe 45F here, which wouldn't be enough to drop it below 30 psi (or wherever the indicator point is). Furthermore, sometimes the light is on after driving a long ways when the tires are hot and reading 38-39 psi when they read 35 cold.

Thanks -

B