Direct and indirect systems are different.
NHTSA describes direct TPMS using pressure sensors in the tires, and indirect TPMS using wheel-speed and other vehicle sensors. Not every vehicle uses the same equipment or provides a numeric pressure display. Check the matching manual before assuming a missing dashboard number means a failed pressure sensor.
Sensor location, power supply, compatibility and service parts depend on the system. This site does not identify a part from a make name or assert that all sensor batteries can be replaced separately.
A dashboard display does not replace a gauge check.
TPMS is a warning aid, not a replacement for routine pressure maintenance. USTMA describes system limitations, including warnings that may not arrive before a substantial loss. No light is not proof that each tire matches its specification.
If a number is absent, stale or disagrees with a gauge, record the condition and follow the manual’s display-update and checking instructions. Do not drive solely to make a number appear if a tire may be unsafe. No screen here can determine which reading is correct.
Reset, calibration and relearn are not universal procedures.
First inspect and check pressures. Then use the exact model/year manual for any required reset, calibration or relearn. Do not reset a warning to hide an unresolved loss, and do not borrow a button sequence from a different model.
The official manual finder provides three verified manufacturer entry points. It does not issue reset commands, scan fault codes or supply every model’s procedure. Sensor replacement and programming require compatible equipment and qualified service.
Prepare a useful service description.
- Vehicle model, model year and market.
- Exact symbol/message and steady, intermittent or flashing behavior.
- Actual gauge readings, specified values and reading conditions.
- Recent wheel/tire work and when the issue started.
Use the check sheet to keep the values separate. Replacement cost, warranty coverage, inspection rules and emissions-test outcomes require local, vehicle-specific information; they are not verified here. A warning remaining after filling does not establish its cause.
Sources & scope
- NHTSA TireWise
U.S. guidance: cold readings, vehicle placards, monthly checks and TPMS warning patterns.
- USTMA Tire Care and Safety guide (©2018)
Passenger/light-truck care: repeated inflation loss, visual inspection limits, loading and valve caps. The PDF carries ©2018; its current revision date is not stated. The URL upload date is not the publication date.
Primary sources checked November 5, 2026. This is not a vehicle-specific inspection.