Tire Pressure Monitor
 

Coming out of the garage in the AM I always get a display message saying my 2007 has low pressure on the left front and left rear (my hand held tire pressure gauge says both are at 30 psi when cold, same as the right front and rear). After driving about 10 minutes both messages go away. Only ever happens on the left. Seems weird both monitors would go at the same time.

Maybe the sensor batteries are dying. I think they live for about 6 years normally.

It's unusual but not impossible for two sensors to start going out at the same time. It could be that the cooler temps in the morning are finishing off a couple of almost-dead batteries.

That becomes more believable if you are still running the original sensors, now about 7 years old.

EDIT: Eric types faster than me.
:D

Never knew the TPMS's had batteries. My RF has been doing the same lately. Goes out after a while as well. Does the motion have anything to do with a low pressure reading going away after a while or do I hafta swap a battery.... or are you pulling my leg about a battery?

Of course they have batteries. Something has to power them for them to transmit a signal. But you cant swap batteries. They are not replaceable. You have to buy new sensors.