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Originally Posted by H3PAC
We've had fairly cool mornings over the last couple of days and when I started my H3 yesterday I got a low tire pressure message. I visually inspected the tires and they appeared to be inflated properly. I drove about a mile and the idiot light and message went out. It happened again this morning. I checked the pressures and 3 tires were right at 35 and another was at 35.5. I drove away and like yesterday, the light and message went out about a mile down the road.
Has anyone else experienced this? Is it likely a bad pressure transducer in one of the tires?
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When did you check the pressure, after the tires had been driven on? Tire pressure must be checked cold, that is no travel on the tires for at least four hours. Tires heat up as they are driven on, and 10 degrees increase in temp of the tire relates to one PSI increase in tire pressure. Normal driving can increase the tire pressure by 4 psi, and the larger the volume in the tire (such as the 285 versus the 265) the more a slight temp decrease can affect the pressure inside the tire.
It sounds like the systemis working properly if it comes on when first started, the goes off as the tires warmup. (Example, tire psi at startup 31 psi, drive one mile, raise it above 32 psi.)
A bad sensor would keep the message on all the time.