Tire warning light on - why?

[HOLOHOLO]

I noticed the inflation sensor light on my dash for the last couple weeks. The 18" tires look fine, and are all at 35lb.

Is there really a problem with inflation or is it warning of something else? Six month rotation schedule?

Anyone know what the pressure limits are for the sensor?

The car is 7 months old and very low miles.

 

[SeCX-9]

I noticed the inflation sensor light on my dash for the last couple weeks. The 18" tires look fine, and are all at 35lb.

Is there really a problem with inflation or is it warning of something else? Six month rotation schedule?

Anyone know what the pressure limits are for the sensor?

The car is 7 months old and very low miles.

Defective TPMS. Problem is, you can't tell which one easily. I'd bring it back to the dealer as this is a warranty covered part.

 

[table5511]

Mine came on, I thought the tires all looked fine too, turns out one was down to 28. would have never guessed.

 

[ceric]

Dealer can tell which is defective. We can't w/o their computer.

 

[table5511]

Here is a really informative article on tpms lifespan http://www.tirereview.com/article/86584/changing_tpms_sensor_batteries.aspx

 

[sts7049]

don't forget the spare, i think it has one as well.

 

[HOLOHOLO]

OK - I am an idiot.

I trusted the airgauge I borrowed from my local Chevron station, where I fill up. When I rechecked, using my digital gauge, I found EVERY tire to be under-inflated at 28.5-30 psi!!

I cranked them up to 36 psi and am enjoying the stiffer ride, though it's noisier. Should improve the sucky MPG's I've been seeing too.

I now use 1 digital and 2 manual gauges on each tire to monitor things. I hope these things are not leaking,...

Sorry if I wasted anyone's time on this.

 

[table5511]

Haha. I trust only my round Slime brand dial guage . No digital guage or air pump guage for me.

 

[HOLOHOLO]

I'll get one. Thanks.

 

[table5511]

 

[jk240sx]

I have a Moroso gauge. I got it for track days. dead accurate and has a bleeder.

 

[HOLOHOLO]

Mmmmm,.. That bleeder's a nice touch.

I should change the batteries on my Accutire gauge, while I'm at it.