Is there a way to adjust the sensitivity of the tire pressure monitors? I just had one go off & the tire was down to 20psi. I would have thought they would be set at least five psi higher.

 

try resetting the TPW reset switch to re-initialize.

TIRE PRESSURE WARNING RESET SWITCH
• By operating the tire pressure warning reset switch,
the tire pressure warning ECU can be set to issue a
warning at an inflation pressure that corresponds to
the type of tires.
Therefore, the dealer must set the warning threshold
to the proper value in order to comply with the local
regulations.
• Operate the tire pressure warning reset switch only
after the inflation pressures of all tires have been
adjusted on the vehicle.

• To initialize the system, press and hold the tire
pressure warning reset switch for 3 seconds or longer
with the power switch on (IG). After the initialization
process has started, the warning light blinks 3 times
(1 second on, 1 second off).
• During initialization, the tire pressure warning valve
and transmitter measures the inflation pressure of the
tires, and registers the signals that are transmitted
into the tire pressure warning ECU at a frequency of
once per minute. The initialization process is
completed when signals from the all tires have been
received.

 

It resets itself when the tire is pumped up. Problem is that it doesn't trip until a tire has lost over 1/3 of it's pressure. I'll have the sensors checked when its in the dealer for the next oil change to change the settings.