Tyres, brakes & chassis

CRITICALLY_LOW_TIRE_PRESSURE

What it is

Critically low tire pressure

This property indicates the critically low pressure threshold for each tire. It indicates when it is time for tires to be replaced or fixed. The value must be less than or equal to minFloatValue in TIRE_PRESSURE. Minimum and maximum property values (that is, minFloatValue, maxFloatValue) are not applicable to this property.

How the ID is built

A property ID is a 32-bit value packing four fields. Reading 0x1760030a apart:

Field	Mask	Value	Means
Group	0xf0000000	0x10000000	SYSTEM
Area	0x0f000000	0x07000000	WHEEL
Type	0x00ff0000	0x00600000	FLOAT
Ordinal	0x0000ffff	0x0000030a	0x30a

Reading it from an app

CarPropertyManager mgr = (CarPropertyManager)
        car.getCarManager(Car.PROPERTY_SERVICE);

float value =
        mgr.getFloatProperty(VehiclePropertyIds.CRITICALLY_LOW_TIRE_PRESSURE, areaId);

This property is read-only — writes are rejected. It is static for the life of the vehicle, so read it once and cache it.