How to Reset the Tire Pressure Light (TPMS) on a Volvo S90

1. Switch off the ignition.
2. Inflate the tires to the pressure shown on the tire pressure placard on the driver's side B pillar.
3. Start the vehicle and open the Car status app in App view.
4. Tap TPMS, then tap Calibrate while the car is stationary.
5. Tap OK to confirm the pressure in all four tires has been checked and adjusted.
6. Drive above 35 km/h (22 mph) until calibration is complete and the tire symbols turn from gray to green.

• Calibrate each time the tires are changed or the tire pressure is adjusted.
• The system gives no other confirmation; if the ignition is switched off before calibration finishes, repeat it in one operating cycle.
• Perform calibration outdoors or where exhaust gas is evacuated, since the engine must be running.

Source: 2018 Volvo S90 owner's manual, PDF pages 521, 522. Steps are summarized in our own words (AI-assisted, checked against the cited pages 2026-10-18). Other model years can differ; your manual has the final word.