Tire pressure warning light is going off but the tires look fine

Dwight Frye · 01-06-2010, 09:29 PM

No problems yet with my 370Z but I have noticed they lose about 1 lb a week on all 4 tires and I've long been aware of larger fluctuations due to the ambient air temperature. I just put a few pumps into each tire with a bicycle pump about once a week rather than trying to find a gas station air pump that works. My G35 Coupe was the first car I owned with TPS monitors and one cold (for SouCal) winter morning the warning went off. I pulled into the closest gas station and checked the tires with my own dial gauge and all 4 were down to about 27 lbs. The standard PSI was supposed to be 35 and I think the TPS sensors are supposed to go off when the pressure drops lower than about 8 PSI below their threshold so the system worked perfectly. I pumped them all back up, drove a few miles and the light went off and never had it happen again.

01-06-2010, 09:29 PM	#1 (permalink)
Dwight Frye Enthusiast Member Join Date: Jul 2009 Location: Occupied California Posts: 423 Drives: '09 Tour/Sport/6MT Rep Power: 15	No problems yet with my 370Z but I have noticed they lose about 1 lb a week on all 4 tires and I've long been aware of larger fluctuations due to the ambient air temperature. I just put a few pumps into each tire with a bicycle pump about once a week rather than trying to find a gas station air pump that works. My G35 Coupe was the first car I owned with TPS monitors and one cold (for SouCal) winter morning the warning went off. I pulled into the closest gas station and checked the tires with my own dial gauge and all 4 were down to about 27 lbs. The standard PSI was supposed to be 35 and I think the TPS sensors are supposed to go off when the pressure drops lower than about 8 PSI below their threshold so the system worked perfectly. I pumped them all back up, drove a few miles and the light went off and never had it happen again.