pdmorris1

My car flashed the low pressure warning today. The psi is suppose to be 30 when I checked the tire it had 28 pressure in the tire. Are they suppose to trigger a warning with only a two pound differance

Oldblue

Perphaps the cold weather triggered the light, per


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donbrew

To begin; are the positions accurate? Did you check them all? With a gauge?

Is there a problem with it warning you?

I think it works on a percentage difference.

pdmorris1

I did check them all with a digital tire gauge. Two were at 30 one at 29 and the 4th was 28. I assume the 28 was what turned the low pressure light. I guess I thought it would take like a 4 or 5 pound lower reading before it would turn the light on

RJ_RS_SS_350

What did the DIC indicate the pressure to be? I had a temperamental sensor, would occasionally indicate a problem with RF. Sometimes the DIC would show dashes -- -- on RF. Actual pressure was always fine. Next time I bought tires, I had the sensor replaced. It's been about 4,000 miles and over 3 months, no problems. The sensors are battery operated and the batteries are not replaceable.

Cokeybill

My '08 HHR SS still has the original TPMs in the original tires(37800 miles). My winter tires I bought back in 2009 also have the original TPMs(bought for the winter tires) in them as well. What would be the expectation for those batteries life? 7-8 years seems lengthy on any battery run device.

J W Davis

My '08 LT has the original TPS valve stems after 78K miles....still works ok.
I will replace all 4 of them on the next tire rotation and balance, not expensicve enough to be concerned about it and will save much trouble later on.
Just saying.

donbrew

The stems are only about $5 each, but the TPM is much more expensive around $15 each on eBay; GM wants about $80 each. You can't replace just the battery.

J W Davis

Thanks my friend, I appreciate it!

donbrew

BTW, the reason I cite the MSRP is because that is the least that a tire store will charge for the parts, plus exorbitant labor.