TPMS This Morning

[ctrcbob]

This morning was the coolest morning so far this year. Got up and the outside temp was 53F. Got in the car (which was parked in my garage), and drove down my street. All of a sudden, WTF? The TPMS lamp came on, and the center panel shows that the two rear tires are low. I don't mind that so much except that trying to get rid of the message on the center panel only lasts for one or two seconds, then the message comes back on. OK, I know that it is because it was colder than normal this morning, so I did nothing thinking that the warning would go off with the outside temps warming up. The warning stayed on, so when I got back home, I checked the pressure in all four tires (remember only the rear two show low) and they all show either 28 or 27.5 lbs. Dug out my portable tire compressor and filled each tire to 35 lbs. (Yes, I know that is more than the 33 lbs called for -- see below).
Then I proceded to go out and do my morning cafe moche drill. No more TPMS warning.

Over filled to 35 lbs because tomorrow morning and perhaps even the morning after, the temperatures will start off at 43F. The pressures will drop at colder temp, so I over filled.

Last December, when I drove out to Roswell, before I ever left Florida, I made sure my tires had 35 lbs. Although I saw cold temps in NW Texas where I stayed overnight, and saw as low as 11F in Roswell, parked outside, the TPMS lamp never came on.

I guess the TPMS lamp does not come on until the pressure gets down around 28 lbs.

 

[jy104]

My car's TPMS also came on when the pressure went below 28.

 

[robthoke]

Same here - mine has only come on once, but the tire was around 28.

 

[dond13]

My TPMS came on when I still had 31 lbs in the timr.

 

[Dan Young]

same thing for me in New Jersey early this week. my passenger side rear tire pressure was at 30 when i got the warning.....

 

[vitacura]

Funny, this morning I also had the TPMS warn me that both my rears were low.

 

[ELTORO]

Mine came on yesterday. Right rear and front driver's side and would not go away until air was placed into the tires. I own two different portable air compressors and could not get neither to put air in to the proper pressure. I had to go buy air.