How To Service Tire Pressure System

How to Service Your Tire Pressure Monitoring System (TPMS)

Maintaining the correct tire pressure is crucial for safety, fuel efficiency, and tire longevity. A Tire Pressure Monitoring System (TPMS) alerts you when tire pressure is low, but the system itself also needs occasional servicing. This guide will walk you through how to service your TPMS effectively.

Understanding Your TPMS

Before diving into servicing, it's important to understand the two main types of TPMS:

Direct TPMS

Direct TPMS uses sensors embedded within each tire valve stem. These sensors directly measure tire pressure and transmit data wirelessly to the vehicle's onboard computer. This system provides accurate, real-time pressure readings.

Indirect TPMS

Indirect TPMS relies on the Anti-lock Braking System (ABS) wheel speed sensors. It infers tire pressure by detecting differences in wheel rotation speed. A low-pressure tire will rotate slower than others. While less precise than direct TPMS, it's generally less expensive.

Common TPMS Issues and How to Address Them

Many TPMS problems can be resolved without professional help. Here are some common issues and solutions:

Low Battery in Direct TPMS Sensors

• Symptom: A malfunctioning TPMS light, or inconsistent readings.
• Solution: Direct TPMS sensors use batteries that eventually need replacing. These are usually small, button-cell batteries. Replacing them is often a DIY task but requires specialized tools for removing and installing the sensors. Consult your vehicle's owner's manual or a professional mechanic if unsure.

Sensor Malfunction

• Symptom: Erratic or inaccurate pressure readings, or a consistently illuminated TPMS warning light.
• Solution: A faulty sensor might need replacement. Again, this is usually a job for a tire professional, as special tools are needed.

TPMS Light Stays On Despite Correct Pressure

• Symptom: The TPMS light remains on even after inflating tires to the correct pressure.
• Solution: This could be caused by a few things: a malfunctioning sensor, a problem with the TPMS module itself, or a simple reset might be needed. Check your owner's manual for instructions on how to reset the system. If the light persists, consult a mechanic.

Damaged Sensor

• Symptom: The sensor has visible damage or has been impacted.
• Solution: This requires sensor replacement.

Maintaining Your TPMS

While you can't directly maintain the sensors themselves, proper tire care significantly contributes to TPMS longevity and accuracy:

• Regular Tire Pressure Checks: Use a reliable gauge and check your tire pressure at least once a month, or before long trips. Remember to check the pressure when the tires are cold.
• Proper Inflation: Always inflate your tires to the recommended pressure specified in your vehicle's owner's manual or on the tire sidewall.
• Regular Tire Rotations: Rotating your tires helps ensure even wear and tear, which can indirectly improve TPMS accuracy.
• Visual Tire Inspection: Check your tires regularly for any signs of damage, such as cuts, bulges, or embedded objects.

When to See a Professional

For complex TPMS issues, or if you're uncomfortable performing any of the above steps, it's always best to consult a qualified tire professional or mechanic. They have the specialized tools and expertise to diagnose and repair TPMS problems accurately.

Remember, a functioning TPMS is a crucial safety feature. Regular maintenance and attention to any warning lights can help ensure you stay safe on the road.