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uk Transport & mobility emergencies tyre pressure warning light • tpms light came on • low tyre pressure alert • tyre pressure sensor warning • dashboard tyre warning • tyre looks fine but warning • pulled over to check tyres • stopped to check tyre pressure • possible puncture warning • slow puncture suspicion • underinflated tyre concern • tyre pressure drop after cold weather • car handling feels different • motorway hard shoulder stop • emergency area breakdown • roadside tyre check • tyre pressure gauge check • air line at petrol station • tyre sidewall damage worry • can i keep driving on tpms light

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

Short answer

Treat it as a real tyre problem until you’ve proved otherwise: check all four tyres with a gauge, and only continue if pressures are correct and there’s no damage or rapid loss.

Do not do these things

  • Don’t keep driving “to see if it goes away” if any tyre looks low, damaged, or the car feels unstable.
  • Don’t put yourself in danger to inspect tyres (for example, standing close to fast traffic or leaning into a live lane).
  • Don’t attempt a roadside repair in an unsafe spot (especially on a motorway hard shoulder or in an emergency area).
  • Don’t use a warning triangle on a motorway.
  • Don’t inflate a tyre that has obvious sidewall damage, a bulge, or visible cords — treat that as “do not drive”.

What to do now

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

    • Hazard lights on. Handbrake on.
    • If you’re on a motorway hard shoulder or in an emergency area and it feels exposed, keep the “outside the car” time as short as possible.

  2. If you’re on a motorway hard shoulder, choose the safest “you” position first.

    • If it’s safe to get out, leave via the left-hand door and wait well away from traffic (for example, behind a barrier).
    • If it’s not safe to get out where you are, stay belted in with hazards on and move straight to getting help.

  3. Do a fast visual check (no tools yet).
    Walk around the car and look for:

    • One tyre visibly lower than the others
    • A nail/screw, cut, split, bulge, or sidewall damage
    • Any hissing sound, or debris lodged in the tread
      If you see a tyre that’s clearly flat or damaged, don’t drive on it.

  4. Check pressures with a gauge (not by kicking the tyre).

    • Use a tyre pressure gauge if you have one, or a petrol station airline when you’re somewhere safe to do that.
    • Compare to the vehicle’s recommended pressures (often in the handbook, inside the fuel filler flap, or on a placard on the driver’s door sill/door shut).
    • Check all four tyres (and the spare if you have one).

  5. If a tyre is low but not obviously damaged, top up to the recommended pressure — then re-check.

    • Inflate to the recommended “cold” pressure as closely as you can.
    • Re-check the reading after topping up.

  6. Make the “continue vs don’t continue” call.

    • Safe to continue (cautiously): pressures corrected and no signs of damage or rapid loss.
    • Not safe to continue: a tyre won’t hold pressure, you find a bulge/sidewall cut, the car’s handling feels wrong, or you can’t check/inflate safely where you are.

  7. If you’re in an emergency area on a motorway and you need to rejoin traffic, follow the motorway process.

    • Use the emergency telephone/SOS phone provided and follow the operator’s advice before exiting; you may be told to wait for a lane closure or assistance.

  8. If the warning stays on after pressures are correct, treat it as “needs checking soon,” not “ignore.”

    • Some cars need a short drive to update; others need a reset process in the handbook.
    • If it remains on, arrange a tyre/TPMS check (slow puncture, valve issue, or sensor fault).

What can wait

  • You do not need to diagnose the exact cause (slow puncture vs sensor fault) right now.
  • You do not need to decide about sensor replacement at the roadside; the priority is whether the tyres are safe to drive on.
  • You do not need to reset anything at the roadside if it’s distracting or unsafe; do it later in a safe place.

Important reassurance

Tyre pressure warnings are common and often fixable (pressure drop, temperature change, or a small puncture). Pulling over safely and checking early reduces the risk of sudden failure.

Scope note

This is first-steps guidance for the moment you’ve stopped to check. If you find damage, repeated pressure loss, or you’re stranded in an exposed location, the safest next step is professional roadside help.

Important note

This guide is general information, not mechanical or legal advice. If you’re not confident the car is safe to drive — or the location makes checking unsafe — prioritise personal safety and get breakdown assistance.

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