Understanding TPMS: Why Your Tyre Pressure Monitor Light Is Flashing | TPMS Services in Fareham
If your tyre pressure warning symbol has suddenly illuminated on your dashboard, you’re not alone. Modern vehicles are fitted with a Tyre Pressure Monitoring System (TPMS) that tracks tyre pressure in real time, alerting you to unsafe pressure changes. A flashing light usually indicates a sensor fault, a pressure imbalance, or a deeper system issue. If ignored, it can affect vehicle safety, fuel efficiency, and even cause you to fail an MOT.
This guide breaks down exactly what TPMS is, why your warning light might be flashing, and how Turnpike Tyres provides specialist TPMS services in Fareham that help drivers stay safe and compliant. Whether you have recently noticed a flashing symbol or want to understand how TPMS works, this article gives you clear, expert guidance from a trusted local team.
What Is TPMS and Why Does It Matter?
A Tyre Pressure Monitoring System is a built-in safety feature that monitors air pressure and alerts you to dangerous changes. There are two main systems found in UK vehicles:
Direct TPMS
Sensors installed in each wheel measure air pressure individually. These are the most accurate, but their batteries eventually fail.
Indirect TPMS
Uses wheel speed data from the ABS system to identify pressure changes.
TPMS matters because:
- Incorrect pressure increases stopping distance
- Poorly inflated tyres reduce fuel efficiency
- Under-inflation causes accelerated tyre wear
- TPMS warnings can result in an MOT failure
Why Is My TPMS Light Flashing? The Most Common Reasons
A flashing TPMS light is not something to ignore. It signals a communication or hardware problem, rather than a routine low-pressure warning. The following are the most common causes.
01.
Low Tyre Pressure
Even a small change in pressure can trigger a warning. Temperature drops, slow punctures, and general tyre wear all play a part.
If you notice repeated low pressure readings, you may need both a puncture repair and a TPMS check. Our team provides this as part of our service, ensuring safe results every time.
02.
Faulty TPMS Sensor Battery
Most TPMS sensors last between five and ten years. When the internal battery begins to fail, the sensor sends intermittent or incorrect data. Flashing typically means the sensor battery is close to the end of its life.
A sensor replacement is a simple task and forms part of our specialist TPMS services in Fareham.
03.
Sensor or Valve Corrosion
Winter roads, salted surfaces, and moisture can cause corrosion around the valve base or sensor casing. This disrupts signal transmission and can lead to a flashing TPMS warning.
During a routine vehicle service, our technicians inspect valves and surrounding components to ensure the entire system functions correctly. This is included in our standard service.
04.
Mismatched or Non-OEM Sensors
If tyres or wheels were recently replaced, universal aftermarket sensors might not pair correctly with your vehicle. This is a common issue that leads to persistent flashing.
Correct programming or OE-specific replacements solve the problem quickly. This adjustment is included in our expert TPMS services and standard service.
05.
Recent Tyre Rotation or Wheel Change
Your vehicle might require a TPMS relearn procedure after tyre rotation or switching between summer and winter tyres. Without this, sensors may report incorrect positioning.
Our wheel alignment and calibration services include TPMS resets as part of a broader diagnostic and adjustment process.
What Should You Do When Your TPMS Light Flashes?
1.
Step 1: Check Tyre Pressure Manually
Use a reliable pressure gauge to confirm readings match the recommended PSI in your vehicle handbook. If pressure is correct, the issue is usually within the system itself.
2.
Step 2: Avoid Ignoring It
Driving long-term with a faulty sensor increases risk because you lose real-time pressure alerts. It also leads to MOT issues, as vehicles automatically fail if a TPMS warning is active.
3.
Step 3: Book a Diagnostic Check
Turnpike Tyres offers full diagnostics, replacements, and resets as part of our TPMS services in Fareham. We use modern equipment to scan system data, identify faults, and calibrate sensors correctly.
How TPMS Works with Full Car Servicing
- Brake checks
- Oil and filter replacements
- Tyre tread inspections
- Suspension assessments
Combining diagnostics with a standard service helps catch tyre-related issues before they become serious.
How Turnpike Tyres Diagnoses TPMS Faults
Our technicians use specialist scan tools and OE-quality parts to ensure accurate results. Diagnostics usually include:
- Live sensor data readings
- Battery lifespan evaluation
- Sensor position checks
- ECU communication tests
- Valve inspections
- System resets
When to Replace TPMS Sensors
TPMS sensors should typically be replaced every five to ten years, depending on mileage and climate conditions. You should also consider replacement if:
- You see repeated TPMS warnings
- Sensors fail after tyre replacement
- Battery readings are low
- Your vehicle documentation shows they are due for renewal
Preventing TPMS Issues Going Forward
A few simple habits reduce the chance of TPMS faults:
- Check tyre pressure monthly Inspect wheels for visible corrosion
- Use OE-quality sensors
- Book yearly diagnostics
- Combine TPMS checks with a routine service
Drive Safer with Professional TPMS Diagnostics
If your tyre pressure warning light is flashing, don’t wait until it leads to a bigger issue. Turnpike Tyres provides accurate TPMS diagnostics, sensor replacements, and system resets - all delivered by experienced technicians who put your safety first.
We’ve helped hundreds of drivers across Fareham and the surrounding areas get back on the road with confidence. Whether it’s a quick inspection or a full TPMS sensor replacement, we’ve got you covered.
Visit us or book your appointment online today.