Tire pressure sensors, also known as TPMS, are essential for safety and fuel economy, but many drivers make mistakes that lead to false alerts or costly repairs. The most common errors include ignoring the warning light, overinflating tires, and using incompatible replacement sensors. Here is how to avoid these pitfalls and keep your system working correctly.
1. Ignoring the TPMS Warning Light
The TPMS light indicates low pressure, a system fault, or a dead sensor battery. Many drivers ignore it until a tire goes flat. Check tire pressure with a gauge when the light comes on. If pressure is correct, the system may need resetting or a sensor replacement. Ignoring the light can lead to uneven tire wear, poor handling, and blowouts.
2. Overinflating Tires to Reset the Light
Some people overinflate tires to turn off the TPMS light. This is dangerous and can cause center tread wear, reduced traction, and increased risk of a blowout. Always inflate to the manufacturer’s recommended pressure, found on the driver’s door jamb or owner’s manual. Overinflation does not fix a faulty sensor.
3. Using Incompatible or Cheap Replacement Sensors
When replacing TPMS sensors, using generic or cheap sensors can cause communication errors with your vehicle’s system. Always use OEM or high-quality aftermarket sensors that match your car’s make, model, and year. Cheap sensors often have short battery life or fail prematurely, costing more in the long run.
4. Forgetting to Relearn the Sensors After Tire Rotation
After rotating tires, the TPMS may need a relearn procedure so the system knows each sensor’s new position. If you skip this step, the dashboard may show incorrect tire positions or trigger a fault light. Follow your vehicle’s relearn procedure or have a shop do it.
5. Neglecting Sensor Battery Life
TPMS sensors have batteries that last 5-10 years. When they die, the sensor must be replaced. If you have an older vehicle, consider replacing all sensors at once to avoid multiple trips. Some shops can test sensor battery life during tire service.
6. Using Tire Sealants That Damage Sensors
Some tire sealants (like fix-a-flat) contain chemicals that can corrode TPMS sensors. If you use a sealant, you may need to replace the sensor afterward. For temporary fixes, use a plug kit or call for roadside assistance.
Frequently Asked Questions
Can I disable my TPMS?
It is not recommended and may be illegal. Disabling TPMS can lead to unsafe driving conditions and fines in some states. Instead, fix the underlying issue.
How much does it cost to replace a TPMS sensor?
Costs range from $50 to $150 per sensor including labor, depending on the vehicle and sensor type. Some shops charge extra for relearning.
Does TPMS affect tire pressure accuracy?
TPMS is accurate to within about 1-2 psi. Use a manual gauge for precise readings. TPMS alerts you to significant pressure drops.
The Bottom Line
Properly maintaining your tire pressure sensors ensures safety, extends tire life, and avoids unnecessary repairs. For more tire care tips, check out our guide on tire maintenance and the best OBD2 scanners to diagnose TPMS issues.
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Video: Related tutorial from YouTube