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What to do if…
a tire pressure warning light comes on and you have pulled over to check it

Produced and maintained by PanicStation.org Published: Last reviewed: Editorial policy UK guide

Short answer

Treat the tyre pressure warning as a real tyre problem until you have checked it. Only continue if the tyres look safe, the pressures are at the vehicle’s recommended levels, and there is no rapid pressure loss or obvious damage.

Do not do these things

  • Don’t keep driving just to see if the warning goes away if any tyre looks low, damaged, or the car feels unstable.
  • Don’t stand close to fast traffic, lean into a live lane, or spend longer outside the car than you need to.
  • Don’t attempt a roadside repair on a motorway hard shoulder, in an emergency area, or anywhere exposed to moving traffic.
  • Don’t use a warning triangle on a motorway.
  • Don’t keep inflating or drive on a tyre with obvious sidewall damage, a bulge, visible cords, or a tyre that will not hold pressure; get professional roadside help.

What to do now

  1. Make the stop safer before you focus on the tyres.

    • Put hazard warning lights on.
    • Keep the parking brake on.
    • If it is dark or visibility is poor, use sidelights.
    • Keep passengers away from traffic if they are outside the vehicle.

  2. If you are on a motorway hard shoulder or in an emergency area, sort personal safety first.

    • If it is safe and possible, leave the vehicle by the side furthest from traffic and wait well away from the vehicle and moving traffic, behind a safety barrier if there is one.
    • Put on high-visibility clothing if you have it and it is within easy reach.
    • If you cannot get safely away from the vehicle, stay belted in with hazard warning lights on and call 999, asking for the police.

  3. Do a quick visual check without putting yourself in danger. Look for:

    • One tyre visibly lower than the others
    • A nail, screw, cut, split, bulge, or sidewall damage
    • Hissing air
    • Debris lodged in the tread

    If a tyre is clearly flat, damaged, or losing air quickly, do not drive on it.

  4. Check the pressures with a gauge if you can do it safely.

    • Use a tyre pressure gauge if you have one.
    • If you cannot check safely where you are, use breakdown assistance rather than trying to work beside fast traffic.
    • Compare the readings with the vehicle’s recommended pressures, usually found in the vehicle handbook, inside the fuel filler flap, or on a placard on the driver’s door sill or door shut.
    • Check all four tyres, and the spare if you have one and may need to use it.

  5. If a tyre is low but has no obvious damage, inflate it to the recommended pressure where it is safe to do so.

    • Use your own inflator or a petrol station airline when you can reach one safely.
    • Re-check the pressure after inflating.
    • If the pressure immediately drops again, treat it as a puncture or valve problem and do not continue driving on it.

  6. Decide whether the car is safe to move.

    • It is usually reasonable to continue cautiously if all tyres are at the recommended pressures, there is no visible damage, and the car feels normal.
    • Do not continue if a tyre will not hold pressure, you find a bulge or sidewall cut, the car’s handling feels wrong, or you cannot check or inflate safely.

  7. If you are in a motorway emergency area and need to rejoin traffic, use the official help route first.

    • Use the emergency telephone if provided, or contact National Highways, and follow the operator’s advice before leaving the emergency area.
    • You may be told to wait for signs, lane control, or assistance before rejoining.

  8. If the warning stays on after the pressures are correct, do not ignore it.

    • Check the vehicle handbook for the TPMS reset or update process.
    • If the warning remains on, arrange a tyre or TPMS check soon, because it may be a slow puncture, valve issue, or sensor fault.

What can wait

  • You do not need to diagnose the exact cause at the roadside.
  • You do not need to decide now whether a TPMS sensor needs replacing.
  • You do not need to reset the warning at the roadside if doing so would distract you or keep you in an unsafe place.
  • You do not need to continue the journey until you are confident the tyres are safe.

Important reassurance

A tyre pressure warning does not always mean the tyre is about to fail, but it does mean the tyres need checking before you treat the journey as normal. Pulling over safely and checking early is the right first step.

Scope note

These are first steps for the moment you have stopped to check a tyre pressure warning. If you find damage, repeated pressure loss, or you are stranded in an exposed location, later decisions may need help from a breakdown service, tyre professional, or emergency operator.

Important note

This guide is general information only. It is not mechanical, legal, emergency service, or professional safety advice, and it cannot assess your vehicle or roadside position.

Additional Resources

Closely connected guides that may be useful during the same situation or its immediate aftermath.

About this guide

This guide was produced and is maintained by PanicStation.org using its published editorial process. Official and specialist sources are checked where relevant, and AI-assisted tools may be used for drafting, organisation, and consistency checks. The site operator remains responsible for publication, revision, and removal decisions.

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