Every driver has seen it, that small tyre pressure warning light glowing on the dashboard. It may seem harmless, but it’s one of your car’s most important safety signals. Ignoring it can cause uneven tyre wear, poor fuel economy, and even a dangerous blowout.
In this complete guide, GripGo Tyres explains what the tyre pressure warning light means, why it comes on, how to reset it, and when to call GripGo Tyre for fast, on-site help.
What Does the Tyre Pressure Warning Light Mean?
The tyre pressure warning light indicates that one or more tyres have low air pressure or that your TPMS (Tyre Pressure Monitoring System) is malfunctioning.
Modern vehicles are fitted with TPMS sensors that continuously monitor the air pressure in each tyre. When the pressure drops about 25% below the manufacturer’s recommendation, the dashboard light turns on, usually a yellow or amber horseshoe symbol with an exclamation mark in the middle.
Simply put, it’s your car’s way of saying, “Check your tyres now.”
Why Does the Tyre Pressure Warning Light Turn On?
This light can appear for several reasons. Understanding each helps you decide what to do next:
- Low tyre pressure:
Small leaks, punctures, or gradual air loss are common causes. Even a slow leak can trigger the light within days. - Temperature changes:
Air expands when warm and contracts when cold. That’s why the light often appears during early mornings or winter months. - TPMS sensor fault:
Damaged or dead sensors can send incorrect readings. These sensors typically last around 5–10 years before their internal batteries fail. - Recent tyre service or rotation:
After fitting new tyres or rotating existing ones, the TPMS may need to recalibrate. Until it does, the light might stay on.
If the warning light flashes before turning solid, it usually means there’s a TPMS system error, not an actual pressure issue.
How to Check Tyre Pressure the Right Way
Checking your tyre pressure correctly is simple but essential:
- Use a reliable tyre pressure gauge: either digital or manual.
- Check when the tyres are cold (before driving), as heat raises pressure readings.
- Compare your readings with the correct PSI listed on the driver’s door frame or in your owner’s manual.
- Inflate or deflate the tyres as needed to reach the proper PSI.
At GripGo Tyres, professionals recommend checking your tyre pressure every two weeks or before long road trips. Properly inflated tyres improve handling, extend lifespan, and boost fuel efficiency.
How Do You Reset the Tyre Pressure Warning Light?
If the warning light stays on after topping up your tyres, it may need to be reset manually.
Here’s how:
- Turn the ignition to the “ON” position without starting the car.
- Locate the TPMS reset button, often under the steering wheel or near the glove box.
- Press and hold until the light flashes three times, then release.
- Start the engine and drive for 10–15 minutes at a steady speed to complete the reset.
If the light remains on, it could indicate a sensor malfunction or calibration issue, something GripGo Mobile Tyre can fix quickly with on-site diagnostics.
Common TPMS Sensor Faults and Fixes
TPMS sensors are small but vital components that can fail over time. Common issues include:
- Dead batteries: TPMS sensors are powered by small built-in batteries that typically last 5–7 years.
- Physical damage: Corrosion, impact, or incorrect fitting can break the sensor or valve stem.
- Signal interference: Aftermarket devices or electrical faults can disrupt sensor communication.
If a sensor is faulty, the system can’t provide accurate readings. At this point, tyre replacement is the best option. GripGo Tyres technicians can replace, reprogram, and calibrate TPMS sensors to ensure accurate readings and reliable alerts.
Understanding Tyre Pressure Changes in Different Seasons
Many drivers notice that their tyre pressure warning light comes on more often during winter. This happens because cold air contracts, reducing tyre pressure by about 1 PSI for every 5°C temperature drop.
In summer, the opposite happens, air expands, slightly increasing tyre pressure.
GripGo Tyres recommends adjusting your tyre pressure seasonally to stay within the ideal range. In winter, add a few extra PSI if your vehicle’s manual allows it. This prevents underinflation and improves fuel economy.
Digital vs Manual Tyre Pressure Checks
Both methods have their benefits, and using the right one depends on your needs:
- Digital Gauges: More accurate and easier to read. Ideal for modern drivers.
- Manual Gauges: Simple, durable, and doesn’t require batteries.
Many modern cars also display tyre pressures check digitally on the dashboard through TPMS sensors. Still, it’s smart to keep a portable gauge as a backup in case the sensors fail or give inconsistent readings.
Is It Safe to Drive With the Tyre Pressure Warning Light On?
Driving with the tyre pressure warning light on isn’t recommended, but short distances are usually fine if you’re heading straight to a service location.
However, long-term driving with low tyre pressure can cause:
- Poor grip and handling
- Reduced fuel efficiency
- Uneven tyre wear
- Higher blowout risk
If the light comes on suddenly while driving, pull over safely and check for visible damage or a flat. If you’re stuck, GripGo Mobile Tyre can reach you quickly and replace or repair your tyre on-site.
Why Maintaining Correct Tyre Pressure Is Essential
Correct tyre pressure keeps your car running efficiently and safely. Here’s why it matters:
- Safety: Underinflated tyres increase stopping distance and reduce cornering stability.
- Fuel Economy: Every 10% drop in pressure reduces fuel efficiency by up to 2%.
- Tyre Lifespan: Proper inflation prevents uneven wear and blowouts.
- Comfort: Balanced pressure ensures a smoother ride and less vibration.
Regular checks help prevent unexpected issues and ensure every drive is smooth and safe.
When to Call GripGo Mobile Tyre
If your tyre pressure warning light keeps coming on or your tyres lose pressure repeatedly, it’s time for a professional check.
GripGo Mobile Tyre offers:
- 24/7 emergency tyre replacement
- TPMS diagnostics and resets
- On-site puncture repair
- Tyre balancing and fitting
- tyre pressure inspections
Their mobile service comes directly to your location, whether you’re at home, work, or stranded on the roadside. With GripGo Tyres, you get expert care, quick service, and peace of mind.
FAQs
Can I drive with the tyre pressure warning light on?
It’s not recommended. Driving with low pressure affects how your car handles, increases fuel use, and wears tyres unevenly. If the light appears, pull over safely and check each tyre. A quick inspection can prevent bigger problems later.
How do I clear my tyre pressure warning light?
Start by adjusting your tyre pressures to the correct level listed in your car manual or on the driver’s door sticker. After that, drive a few miles — the light often turns off automatically. If it stays on, you might need to reset it manually or have it checked at GripGo Tyres for a proper inspection.
How serious is a tyre pressure warning?
It’s a sign that something isn’t right. Ignoring it can cause tyres to overheat, wear unevenly, or even burst while driving. Think of the warning as an early safety alert — not something to ignore.
How much does it cost to fix a tyre pressure sensor?
Costs vary depending on the make and model of your car. On average, replacing one TPMS sensor can cost between £40 and £100, including fitting. GripGo Mobile Tyre offers quick replacements and diagnostics at competitive rates.
Final Thoughts
The tyre pressure warning light is a simple but powerful safety feature. It warns you before minor issues become serious problems. Understanding what it means, checking pressure regularly, and getting timely service can save you from costly repairs and unsafe conditions.
Whenever you’re unsure, rely on GripGo Mobile Tyre, trusted experts who keep your tyres in top shape and your journey smooth, safe, and worry-free.
