TPMS Law UK: MOT Failure, PCO & Taxi Rules Explained
If your TPMS warning light is on, it’s not just a minor issue — it can lead to an MOT failure and problems for PCO or taxi drivers. Understanding TPMS law in the UK is important to avoid fines, failed tests and downtime.
At Fix My TPMS, we provide TPMS diagnostics, sensor replacement and programming across London and Essex to help drivers stay compliant and avoid MOT or PCO failures.
Is TPMS a Legal Requirement in the UK?
Yes. TPMS (Tyre Pressure Monitoring System) is a legal requirement on most vehicles registered from 2012 onwards. If your vehicle has TPMS fitted, it must be working correctly.
Driving with a faulty TPMS system can affect vehicle safety and may result in MOT failure.
Does TPMS Affect MOT?
Yes. A TPMS warning light can cause an MOT failure.
Under UK MOT rules:
- If the TPMS warning light is on → MOT FAIL
- If the TPMS light is flashing → MOT FAIL
- If a TPMS sensor is missing or faulty → MOT FAIL
This applies to vehicles that are required to have TPMS (generally 2012 onwards).
Why TPMS Causes MOT Failure
TPMS is considered a safety system. If it is not working, the vehicle cannot reliably detect low tyre pressure, which increases the risk of accidents.
Common MOT failure causes include:
- Faulty TPMS sensor
- Dead sensor battery
- Incorrect TPMS programming
- Warning light on dashboard
TPMS and PCO / Taxi Requirements
For PCO and taxi drivers, TPMS issues can be even more serious.
In London, private hire and taxi vehicles must meet strict safety standards. A TPMS warning light can lead to:
- Vehicle inspection failure
- PCO licence delays
- Loss of income due to downtime
If your TPMS system is not functioning correctly, your vehicle may not pass inspection or remain compliant for PCO use.
Solid vs Flashing TPMS Light (Important for MOT)
Solid TPMS Light
A solid TPMS warning light usually means a tyre pressure issue.
- Low tyre pressure
- Temperature changes
- Possible slow puncture
This still results in an MOT failure if not resolved.
Flashing TPMS Light (Flashes Then Stays On)
A flashing TPMS light indicates a system fault.
- Faulty TPMS sensor
- Dead battery in sensor
- Programming or coding issue
This type of fault will not be fixed by inflating tyres and will fail MOT or PCO inspection.
How to Fix TPMS Before MOT
To avoid MOT failure, you should:
- Check and inflate tyre pressures
- Reset the TPMS system if required
- Diagnose any sensor faults
- Replace faulty TPMS sensors
- Ensure proper TPMS programming
If your TPMS warning light will not reset, professional diagnostics are required.
TPMS Services in London and Essex
Fix My TPMS provides professional TPMS services to help drivers pass MOT and PCO inspections.
We help drivers fix TPMS warning light issues quickly and correctly without guesswork.
Related Guides
FAQs
Will TPMS fail MOT in the UK?
Yes. If the TPMS warning light is on or flashing, it will result in an MOT failure.
Can I pass MOT with TPMS light on?
No. A TPMS warning light is considered a fault and will fail the MOT.
Do taxis and PCO vehicles need TPMS working?
Yes. TPMS must be functioning correctly to pass inspections and remain compliant.
Can I just reset TPMS before MOT?
Only if the issue is tyre pressure. If there is a fault, it must be repaired.
Need Help Passing MOT or PCO Inspection?
If your TPMS warning light is on, contact Fix My TPMS for professional diagnostics, sensor replacement and programming across London and Essex.
View our TPMS services or call today for help.