The tire pressure monitoring system1 uses sensors mounted in the tire valves to check inflation pressure levels. When the vehicle is moving at a speed of approximately 20 mph (30 km/h) or faster, these sensors transmit inflation pressure data to a receiver located in the vehicle.

USA – FCC ID: MRXG403MA4A
This device complies with part 15 of the FCC rules. Operation is subject to the following conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
When low inflation pressure is detected, TPMS will light up the tire pressure warning light (also referred to as a telltale) in the instrument panel (see page 61), and will display a message in the text window. The wording of this message is determined by the degree of inflation pressure loss.

A On certain models, the FCC code is MRXTG315AM04

When low inflation pressure is detected, TPMS will light up the tire pressure warning light (also referred to as a telltale) in the instrument

panel and will display one of the following messages in the text window: LOW TIRE PRESS.

CHECK TIRES or VERY LOW TIRE PRESSURE.

NOTE
If a fault occurs in TPMS, the tire pressure warning light will flash for approximately 1 minute and TIRE PRESS SYST SERVICE REQUIRED will be displayed.

Each tire, including the spare (if provided), should be checked monthly when cold and inflated to the inflation pressure recommended by the vehicle manufacturer on the vehicle placard or tire inflation pressure label. (If your vehicle has tires of a different size than the size indicated on the vehicle placard or tire inflation pressure label, you should determine the proper tire inflation pressure for those tires.) As an added safety feature, your vehicle has been equipped with a tire pressure monitoring system (TPMS) that illuminates a low tire pressure telltale when one or more of your tires is significantly under-inflated. Accordingly, when the low tire pressure telltale illuminates, you should stop and check your tires as soon as possible, and inflate them to the proper pressure.

Driving on a significantly under-inflated tire causes the tire to overheat and can lead to tire failure. Under-inflation also reduces fuel efficiency and tire tread life, and may affect the vehicle's handling and stopping ability.

Please note that the TPMS is not a substitute for proper tire maintenance, and it is the driver's responsibility to maintain correct tire pressure, even if under-inflation has not reached the level to trigger illumination of the TPMS low tire pressure telltale.

Your vehicle has also been equipped with a TPMS malfunction indicator to indicate when the system is not operating properly. The TPMS malfunction indicator is combined with the low tire pressure telltale. When the system detects a malfunction, the telltale will flash for approximately one minute and then remain continuously illuminated. This sequence will continue upon subsequent vehicle start-ups as long as the malfunction exists. When the malfunction indicator is illuminated, the system may not be able to detect or signal low tire pressure as intended. TPMS malfunctions may occur for a variety of reasons, including the installation of replacement or alternate tires or wheels on the vehicle that prevent the TPMS from functioning properly. Always check the TPMS malfunction telltale after replacing one or more tires or wheels on your vehicle to ensure that the replacement or alternate tires and wheels allow the TPMS to continue to function properly.

NOTE
TPMS indicates low tire pressure but does not replace normal tire maintenance. For information on correct tire pressure, please refer to the tire inflation pressure table in this chapter or consult your Volvo retailer.

Erasing warning messages
When a low tire pressure warning message has been displayed, and the tire pressure warning light has come on:

1. Use a tire pressure gauge to check the inflation pressure of all four tires.
2. Re-inflate the tire(s) to the correct pressure.
3. Drive the vehicle for several minutes at a speed of 20 mph (30 km/h) or faster.

> This will erase the warning text and the warning light will go out.

WARNING
Incorrect inflation pressure could lead to tire failure, resulting in a loss of control of the vehicle.

Changing wheels with TPMS
Please note the following when changing or replacing the factory installed TPMS wheels/ tires on the vehicle:
• Only the factory-mounted wheels are equipped with TPMS sensors in the valves.
• If the vehicle is equipped with a temporary spare tire, this tire does not have a TPMS sensor.
• If wheels without TPMS sensors are mounted on the vehicle, TIRE PRESS SYST SERVICE REQUIRED will be displayed each time the vehicle is driven above 25 mph (40 km/h) for 10 minutes or more.
• Once TPMS sensors are properly installed, the warning message should not reappear.
• Volvo recommends that TPMS sensors be fitted on all wheels used on the vehicle.
Volvo does not recommend moving sensors back and forth between sets of wheels.

NOTE
If a tire is changed or if the TPMS sensor is moved to another wheel, the sensor’s seal, nut and valve core should be replaced.

CAUTION
When inflating tires with TPMS valves, press the pump's mouthpiece straight onto the valve to help avoid bending or otherwise damaging the valve.

Recalibrating TPMS (Canadian models only)
In certain cases, it may be necessary to recalibrate TPMS to conform to Volvo's recommended tire inflation pressures, for example, if higher inflation pressure is necessary when transporting heavy loads, etc

To recalibrate:
1. Switch off the engine.
2. Inflate the tires to the desired pressure and turn the ignition key to position I or II.
3. Turn the thumb wheel on the left-side steering wheel lever until Tire pressure Calibration appears in the display.
4. Press and hold the Reset button on the left-side steering wheel lever until TIRE PRESSURE CALIBRATED is displayed.

Activating/deactivating TPMS (Canadian models only)
1. Switch off the engine.
2. Turn the ignition key to position I or II.
3. Press and hold the Reset button on the left-side steering wheel lever until TIRE PRESS SYST OFF is displayed.

Repeat steps 1-3 to turn TPMS on again.