Quick answer
Do not treat a TPMS warning as a reset-button problem. First measure and correct each cold tyre pressure to the vehicle label. The G9 handbook says automatic calibration follows tyre replacement after more than 17 minutes of driving, including 10 minutes above 40 km/h while avoiding reversing.
Before you start
Park safely and inspect the tyre before adding air. A tyre that is visibly low, damaged, hot, bulged or losing pressure needs tyre assistance, not a calibration drive. Use an accurate gauge and the pressure label for the exact wheel/tyre fitment.
- Read the precise warning: low pressure, very low pressure or TPMS system fault.
- Measure all tyres cold, including the one that looks normal.
- Inspect tread, sidewall, valve and wheel for damage.
- Confirm any replaced sensor is compatible and properly fitted.
What to do
Before you start, read the complete sequence. Follow these steps in order and stop if the vehicle shows a stronger warning than the one described here.
- Correct the pressures to the vehicle placard; do not use a pressure copied from another G9 or the tyre sidewall maximum.
- Drive normally only if every tyre is safe. The handbook’s calibration context requires more than 17 minutes, with at least 10 minutes above 40 km/h and without reversing.
- After the drive, park and recheck the displayed values and warning.
- If a pressure drops again, stop treating it as calibration and arrange leak or valve diagnosis.
Expected result
You should expect the following result when the documented route is successful: After correct pressures and the required drive, the displayed values should stabilise and a replacement-related calibration warning should clear. Pressure changes with temperature are normal; a persistent difference or repeat loss is not.
If it still does not work
A “TPMS system fault” or warning that remains after correct pressure and a suitable drive can indicate a sensor, fitment or system issue. Record all four displayed readings, which tyre was changed and the warning text, then contact the tyre installer or XPENG service centre.
Safety and model boundary
Never drive the calibration pattern on an unsafe tyre or choose speed merely to clear a warning. Road, traffic and tyre safety take priority. Private modification of the TPMS is prohibited by the handbook.
Official handbook evidence
XPENG G9 2025 User Manual, PDF page 163 (printed page 165), “Tyre Pressure Monitoring System TPMS”.
What to record before asking for help
Write down the model, model year, current XOS version and the time the problem occurred. Add the exact display wording, the last action that worked and the outcome of each safe check above. For charging issues include the charger type and its indicator; for access issues include the key method used. Do not include a VIN, registration, account password, PIN or verification code in a public post.
Why this matters: menu names, hardware and behaviour can change with market, model year and XOS version. Record the exact wording shown by the car before contacting support. That gives a service adviser a reproducible symptom instead of a general description.