Tire Pressure Warning Light: What to Do and Why It Matters

On February 25, 2026 By newsroom Topic: Automotive

Why the Light Comes On

Temperature Drops: Tire pressure decreases by ~1 psi for every 10°F drop in temperature.
Tire Leaks: Slow leaks or punctures may also trigger the warning.
Natural Air Loss: Tires lose air over time, even without damage.

What to Do When the Warning Light Activates

Pull Over Safely:
- Stop at the earliest safe opportunity.

Check Tire Pressure:
- Use a tire pressure gauge or go to a gas station with air service.
- Compare readings to the manufacturer’s recommended cold-tire pressure (found in the owner’s manual or driver’s doorjamb).

Inflate Tires if Needed:
- Add air until the pressure matches the recommended level.
- Don’t overinflate—this can also impact performance.

Monitor the Light:
- If the light turns off, your tires are likely fine.
- If it stays on, recheck the pressure or look for signs of damage.

Don’t Ignore It:
- Underinflated tires can reduce fuel efficiency, impair handling, and increase the risk of a blowout.

Regular Maintenance Tips

Monthly Pressure Checks: TPMS is a warning tool, not a substitute for regular maintenance.
Check Cold Tires: Measure pressure after the car has been parked for at least 3 hours.
Rotate Tires Regularly: Promotes even wear and accurate TPMS readings.

Understanding Tire-Pressure Monitoring Systems (TPMS)

Direct Systems:
Use sensors inside each tire to monitor pressure.
Sensors are often attached to the valve stem.
Indirect Systems:
Monitor wheel speed using ABS sensors to detect differences in tire rotation (indicating pressure changes).

FAQs About TPMS

1. If I Get New Tires, Do I Need New Sensors?

Not Always: Sensors are reusable if in good condition.
Battery Life: Sensors typically last about 10 years and may need replacement when their battery dies.

2. How Much Do TPMS Sensors Cost?

Standard Sensors: $45–$65 each.
Luxury/Niche Vehicles: Rarely, specialized sensors may cost hundreds.

3. Can I Drive with the TPMS Light On?

Yes, but carefully: Check your tire pressure as soon as possible to avoid potential risks.

Takeaway

The TPMS light is a helpful safety feature. When it activates:
- Don’t panic but check your tires promptly.
- Perform regular maintenance to avoid unnecessary alerts.
- Address issues like leaks or low pressure to maintain safe driving conditions.

Stay safe on the road!