Why does my Ford say tire pressure sensor fault?
A TPMS fault in a Ford is usually caused by a dead or failing wheel sensor, a weak sensor battery, a tire leak, or a need to relearn the sensors after a wheel service. In many cases, the issue can be resolved by checking tire pressures, performing a relearn, or replacing a faulty sensor.
Understanding TPMS and the fault message
TPMS (tire pressure monitoring system) watches each tire’s air pressure and alerts you if it drops too low or if the sensors can’t communicate with the vehicle. A “TPMS fault” message means the system cannot read or communicate with one or more sensors, or its control module detects an abnormal condition. Ford models can vary in how the fault is reported or reset.
Common causes of a TPMS fault on Ford
Here are the typical reasons a Ford may display a tire pressure sensor fault. Each cause requires a different fix, from simple pressure checks to sensor replacement.
- Weak or dead TPMS sensor in one or more wheels (the most common cause).
- Battery inside a TPMS sensor has died or is nearing end of life (sensors typically last several years).
- Low or uneven tire pressures across the wheels, or a slow leak in one tire.
- Wheel/tire changes (rotation or new tires) performed without a proper TPMS relearn.
- Faulty TPMS receiver or control module within the vehicle (less common but possible).
- Incompatible or mismatched sensors after tire/wheel service or aftermarket parts.
- Software or calibration issues in the vehicle’s TPMS system that require a dealer update or reflash.
Understanding these causes helps frame the next steps. If you notice a persistent fault even after correcting pressures, the issue is more likely a sensor or module problem rather than a simple gauge error.
How to diagnose and fix a TPMS fault in a Ford
The following steps guide most Ford owners through common troubleshooting, but model-specific quirks mean you should consult your owner's manual or a technician for your exact year and trim.
- Verify all tires are inflated to the recommended pressure listed on the door jamb placard and check for signs of leaks or damage.
- Inspect valve stems and tires for punctures, nails, or slow leaks that can cause sporadic readings.
- If pressures are correct, attempt a TPMS relearn using your vehicle’s settings or a professional tool. Methods vary by model; consult the owner’s manual or a dealer for your exact procedure.
- Consider a sensor re-learn or replacement if you recently had tires changed or if you installed aftermarket sensors. Ensure any new sensors are compatible with your Ford’s TPMS.
- Use an OBD-II scanner or take the car to a shop to pull TPMS fault codes, which can point to the specific sensor or module that’s failing.
- If a sensor has died, have it replaced and see if a full system relearn is required. A wheel balancing may also be recommended after sensor work.
After performing these steps, you should either have the TPMS fault resolved or have identified a specific faulty sensor or module that needs replacement. In some cases, a software update from Ford or the dealer may also be required.
What to expect at the shop
When you bring your Ford to a tire shop or dealer, technicians will typically start with a TPMS diagnostic scan to pull fault codes, identify which sensor is problematic, and verify the system’s ability to communicate with all wheel sensors. They will check tire pressures, inspect tires and valves, and perform a relearn or reprogramming as required. If a sensor is dead, they will replace it with a compatible TPMS sensor and perform a full system relearn. If multiple sensors are aging, you may be advised to replace several units at once.
Costs vary by model and sensor type, but typical ranges are: sensor replacements $60–$120 per wheel (parts), plus labor for relearn and programming. Some Ford models require a dealer visit for reprogramming, which can add to the cost. Ask for a full diagnostic report to understand which component is at fault and what the relearn entails.
Summary
A tire pressure sensor fault on a Ford usually points to a TPMS hardware issue (a bad or aging sensor, or a dead battery), a mislearn after tire/wheel work, or a software/calibration problem. Start by verifying all tires are at the correct pressures and performing any recommended relearn. If the fault persists, have a technician diagnose with a TPMS tool to identify the specific sensor or module failure and replace or reprogram as needed. Regular maintenance, including checking tires and keeping TPMS components up to date, helps prevent future faults.
