Tyre pressure warning light: what it means and how to reset it
It's the yellow symbol that looks like a horseshoe with an exclamation mark in the middle: a cross-section of a tyre. It means the car thinks at least one tyre is low. Usually it's right, sometimes it's just the first cold morning of autumn, and occasionally it's the system itself that's at fault. Here's how to tell, and how to reset it on your car.
Steady, flashing or red
- Steady yellow light: one or more tyres is below the pressure the car expects. Check all four at the next safe chance.
- Flashing for about a minute, then steady: a fault with the system rather than a low tyre. Often a wheel without a sensor (such as a space-saver spare), a sensor with a flat battery, or a system that needs resetting.
- Red light or a "puncture" message: a tyre is losing air fast. Slow down and stop somewhere safe as soon as you can.
Can I keep driving?
With a steady light, you can usually drive carefully to somewhere you can check the tyres, like a petrol station a few miles away. Take a look at all four first: if one is visibly flat or bulging, don't drive on it. Change it for the spare or call for help. A soft tyre at motorway speed overheats, and that's how blowouts happen.
Don't just ignore it either. On cars first used from January 2012 onwards that came with a warning system, a system that's malfunctioning or obviously not working fails the MOT. A light that's on only because a tyre is low isn't automatically a fail, but set the pressures and reset the system before the test to be safe.
Why it comes on when it gets cold
Air contracts in the cold, so tyre pressures drop by roughly 1 psi for every 5 to 6°C the temperature falls. Tyres set on a mild afternoon can be a few psi down by the first frosty morning, which is just enough to trip the light. The answer isn't to reset it: it's to top the tyres up to the right cold pressure, then reset if your car needs it. More in cold mornings and the tyre pressure light.
Two kinds of system
Cars do this one of two ways, and it decides whether you need to reset anything.
- Indirect systems have no sensors in the tyres. They use the ABS to compare how fast each wheel turns: a soft tyre is slightly smaller, so it spins faster. They only know what "normal" is because you told them, so after every pressure change you have to reset them. Most Volkswagen, Audi, Skoda, SEAT, Peugeot, Citroën, Fiat, Honda and newer Vauxhall models work this way.
- Direct systems have a small sensor in each wheel, behind the valve, that measures the actual pressure. Most of them clear the light by themselves once the tyres are right and you drive a few minutes. Land Rover, Jaguar, Nissan, Toyota, Tesla and many larger cars work this way.
The easy way to tell: if your car can show you the pressure of each tyre on a screen, it has sensors. If it only ever says "OK" or warns, it's indirect.
Before you reset: set the pressures first
A reset tells the car "this is what right looks like". If you reset with a tyre still low, it will treat low as normal and may not warn you next time. So always:
- Check all four tyres cold, before you've driven far.
- Set them to your car's figures, from the door-pillar or fuel-flap label, the handbook, or a check by registration here. Use the fully loaded figures if you're loaded up.
- Then reset, with the car parked, following the steps for your make below.
How to reset it, by make
Menu names change between models and years, so treat these as a guide and check your handbook if yours looks different. Tap your make.
AudiDepends on model
Most UK Audis (A1, A3, A4, Q2, Q3 and others) use the indirect tyre pressure loss indicator. Some larger models have sensors in the wheels and show 'Tyre pressure monitoring' instead. Either way, Audi asks you to store the pressures after changing them.
- Set all four tyres to the correct cold pressure for the load.
- Switch the ignition on and stay parked.
- In the MMI, go to Car (or MENU) > Systems > Servicing & checks > Tyre pressure monitoring (or Tyre press. loss indicator).
- Choose Store tyre pressures and confirm.
Cars without the MMI screen
- Some A1s have a button in the glovebox: hold it until you hear a tone.
- Older cars without MMI store the pressures through the instrument panel menu, using the reset button on the wiper stalk.
When to reset: Store the pressures every time you change them, or change wheels or tyres.
BMWDepends on model
BMW has two systems: the indirect Flat Tyre Monitor, common on older cars and those with run-flat tyres, and the Tyre Pressure Monitor, with sensors in the wheels, on most recent cars. Both need a reset after the pressures change.
- Set all four tyres to the correct cold pressure.
- In iDrive, go to My Vehicle (or Vehicle info) > Vehicle status > Tyre Pressure Monitor (or Flat Tyre Monitor).
- Start the engine but don't drive off, then select Perform reset.
- Drive off. Above about 19 mph the new pressures are accepted; on the sensor system the tyres turn green on the screen when it's done.
Older cars without iDrive
- Use the button on the end of the indicator stalk to scroll to the tyre reset item and hold it, or press the separate RESET button, then drive.
When to reset: Reset after every pressure adjustment and every tyre or wheel change.
Exact menu names on the newest iDrive versions may differ. Check the handbook in the car's menu.
CitroënNo sensors: needs a reset
Most UK Citroëns from about 2013 (C3, C3 Aircross, C4, C5 Aircross, Berlingo and current models) use an indirect under-inflation detection system, so you reset it after setting the pressures. Some older models, such as the C5 from about 2008 to 2017, had sensors in the valves.
- Set all four tyres to the label pressures, cold, suited to the load.
- Switch the ignition on, staying parked.
- On the touchscreen, open the Driving (or Vehicle) menu and choose the under-inflation reinitialisation option; without a touchscreen, use the dashboard display menu (Drive assist > Tyre pressures).
- Confirm. A high-pitched beep means it worked; a low tone means it didn't.
Citroën C1
- With the ignition on, press the reset button in the glovebox until the warning lamp flashes 3 times, then wait a few minutes before switching off.
When to reset: Reset after every pressure adjustment or wheel change.
CupraNo sensors: needs a reset
Every Cupra, including the electric Born, uses an indirect system that compares wheel speeds, so you store the pressures after setting them.
- Set all four tyres to the correct cold pressure, with the car parked.
- Switch the ignition on.
- On the touchscreen, go to Vehicle > Status (or Exterior) > Tyres; on the Born, Vehicle info > Vehicle status.
- Store the pressures. A message, a flash of the light and a tone confirm it.
When to reset: Recalibrate after any pressure or wheel change. It then learns over a longer drive at varied speeds.
DaciaDepends on model
Recent Dacias (Sandero from 2021, Jogger, Duster from 2024) mostly use an indirect tyre pressure loss warning; many from about 2014 to 2021 had sensors in the valves. Dacias from before about 2014 generally have no system.
- Set all four tyres to the driver's-door label pressures, cold.
- Switch the ignition on, staying parked.
- Using the dashboard switch, go to the Vehicle tab and select 'Tyre pressure init. long press'; with a touchscreen, Vehicle > Tyre pressure > Reset > Yes.
- Hold OK until 'Operation completed' appears.
When to reset: Reset after re-inflating, changing pressures, or changing or swapping wheels.
Which system a particular Dacia has varies by model and market.
DSDepends on model
Recent DS models (DS 3 Crossback, DS 4, DS 7, DS 9) are thought to use the same indirect system as Peugeot and Citroën; older ones such as the DS 5 have sensors in the valves. If your screen shows a pressure for each tyre, it has sensors.
- Set all four tyres to the label pressures, cold.
- Switch the ignition on, staying parked.
- In the touchscreen's Driving or Vehicle menu, choose the under-inflation reinitialisation option and confirm.
When to reset: Indirect models: reset after every pressure or wheel change. Sensor models: no driver reset.
We couldn't confirm the exact DS menu names, so check the handbook.
FiatNo sensors: needs a reset
Most UK Fiats from about 2015 (500, Panda, Tipo, 500X) use an indirect system called iTPMS, so you reset it after setting the pressures. Ignore US guides: American 500s have sensors.
- Inflate all four tyres to the handbook pressures, cold.
- Stop, with the ignition on.
- 500X: Main Menu > Vehicle info > Reset tyre pressure, holding OK for 2 seconds until 'Reset saved'. Tipo: hold the Reset button on the left control panel for 2 seconds.
- Drive. It learns best on a straight road at about 50 mph for 20 minutes.
500 and Punto
- Press MENU briefly until 'Reset' shows, choose Yes with + or –, press MENU to Confirm and choose Yes again. 'Reset saved' appears.
When to reset: Reset every time you change a pressure, replace or rotate a tyre, or fit the space-saver.
FordDepends on model
Most UK Fords (Fiesta, Focus, Puma, Kuga and others) use an indirect deflation detection system. Some, such as the S-Max, Galaxy and Transit Connect, have sensors in the wheels. Ford asks for a reset after inflating either way.
- Set all four tyres to the correct cold pressure, with the car parked. It won't reset while moving.
- Switch the ignition on.
- Using the steering-wheel controls, open Settings on the dashboard display and find the tyre item. It's called Deflation detection, Tyre Monitor or Tyre Pressure, depending on the model.
- Press and hold OK until the reset is confirmed.
When to reset: Reset after adjusting pressures or changing tyres. On sensor models, after new sensors or a tyre rotation, park for 20 minutes first; they relearn in about 15 minutes of driving.
HondaNo sensors: needs a reset
Hondas use an indirect Deflation Warning System that compares wheel speeds; there are no sensors in the wheels. It has to be calibrated every time the pressures change.
- Set all four tyres to the specified cold pressure, with the car in Park.
- Touchscreen models: Home > Vehicle Settings > Deflation Warning System > Calibrate.
- Models with a dashboard display (such as the 2015–2020 Jazz): use the steering-wheel buttons to go to Customise Settings > Deflation Warning System > Initialise, and confirm.
- Drive normally. Calibration finishes after about 30 minutes of driving at 25–62 mph.
When to reset: Calibrate after adjusting pressures, rotating tyres or replacing a tyre. It won't calibrate with a space-saver fitted.
HyundaiDepends on model
Many smaller and older Hyundais use an indirect system with a reset; larger and newer models (Tucson, Santa Fe, Kona, Ioniq) mostly have sensors in the wheels.
- Cars with sensors: inflate all four tyres to the correct cold pressure and drive. The light should go out within a few minutes.
Indirect models
- Set all four tyres to the correct cold pressure, with the car parked.
- Either select Tyre Pressure on the dashboard display, press and hold OK and choose Set, or press and hold the TPMS button under the steering wheel until the light blinks.
- Drive for about 20 minutes so it learns the new pressures.
When to reset: Indirect models: reset after every pressure adjustment. Sensor models: no reset needed.
JaguarSensors in the wheels
Jaguars with a warning system have sensors in each wheel, and all new ones have had it since 2014.
- Inflate all four tyres, cold, to the recommended pressures. The instrument panel's Tyre Pressures menu shows them.
- If your car has a TPM Load Setting (under Vehicle Information > Tyre Information), set it to match the pressures you used.
- There's no reset. Drive for at least 15 minutes above about 16 mph and the system recalibrates.
When to reset: No reset needed: it relearns by itself on a drive.
KiaDepends on model
Kia fits two types, and the same model can have either. Many Picanto, Ceed, XCeed and older Sportage cars have an indirect system with a TPMS SET button; higher trims, newer models and EVs have sensors in the wheels.
- Cars with sensors: inflate all four tyres to the correct cold pressure and drive. The light goes out by itself after about 10 minutes above 16 mph.
Cars with a TPMS SET button
- Park and set all four tyres to the cold pressure on the driver's door-pillar label.
- Start the engine, staying parked.
- Press and hold the TPMS SET button (under the dashboard, left of the steering wheel) for about 3 seconds, until the light blinks and goes out.
- Drive for about 20 minutes so it learns the new pressures.
When to reset: Button models: reset after every pressure adjustment or tyre change. Sensor models: no reset needed.
Land RoverSensors in the wheels
Land Rovers with a warning system have sensors in each wheel; you can spot them by the metal valve with a lock nut. All new Land Rovers have had one since 2014. The classic Defender (up to 2016) and older models such as the Discovery 1 and 2 and Freelander 1 don't have one at all.
- Inflate all four tyres, cold, to the label pressures for the load you're carrying.
- There's no reset button. Drive above about 16 mph and the warning should clear within about 5 minutes.
- If your car has a load setting (Vehicle Info > Tyre Information > TPM Load Setting), set it to match: Normal (light) or Heavy.
When to reset: No reset needed. After changing a wheel or tyre, leave the car parked for 15 minutes so the system can pick up the change.
LexusSensors in the wheels
All current UK Lexus models have sensors in the wheels and are reset much like Toyotas.
- Set all four tyres to the correct cold pressure.
- Turn the ignition on.
- Open Vehicle Settings on the dashboard display with the steering-wheel controls, select the tyre pressure item and follow the prompts.
- Some models (such as the RC F) have a TPMS button under the dashboard instead: hold it until the light flashes and goes out.
When to reset: Reset after inflating tyres to the correct pressure and after replacing a tyre.
MazdaDepends on model
Many Mazdas from about 2013 to 2019 (Mazda2, 3, 6, CX-3, CX-5 of that era) use an indirect system with a set switch; newer models such as the CX-30 have sensors in the wheels.
- Newer (sensor) models: inflate all four tyres to the correct cold pressure, then drive at 16 mph or more for 3 minutes. The light should go out.
Older models with a set switch
- Park with the parking brake on and set all four tyres to the door-frame label pressures, cold.
- Turn the ignition on.
- Press and hold the tyre pressure set switch until the warning light flashes twice and it beeps.
When to reset: Indirect models: reset after adjusting pressures, rotating or replacing tyres, or a flat battery. Sensor models: no reset needed.
Mercedes-BenzDepends on model
Many Mercedes from about 2009 to 2020 (A, B, C, E, CLA, GLA, GLC and others) use an indirect tyre pressure loss warning system. Others have a tyre pressure monitor with sensors in the wheels, more common on recent and larger models. Cars from before about 2009 often have neither.
- Set all four tyres to the correct cold pressures on the fuel-flap label, for your load.
- Switch the ignition on.
- Using the steering-wheel buttons, open the Service menu on the dashboard and select Tyre pressure.
- Choose to restart the system and confirm: 'Tyre press. now OK?' or 'Use current pressures as new reference values?' > Yes.
- Drive normally. After a few minutes it stores the new pressures and clears any warning.
When to reset: Restart the system after any pressure change, wheel change or rotation.
Cars with the MBUX touchscreen (2018 on) have the same restart option; the exact menu wording varies, so check the car's digital handbook.
MGSensors in the wheels
Current MGs (MG4, MG5, ZS EV and others) have sensors in the wheels and show each tyre's pressure on the screen and in the app. There's no reset button.
- Set all four tyres to the handbook cold pressure.
- Drive normally. The system relearns as you go; readings can be off for the first few minutes.
- If it doesn't clear, switch off and lock the car for about 25 minutes, then drive for about 15 minutes.
When to reset: No reset needed after inflating. If wheels are swapped or rotated, an MG dealer needs to reprogram the sensor positions.
Based on owners' copies of the handbook rather than an official MG page, so check yours.
MINIDepends on model
Older MINIs use the indirect Flat Tyre Monitor. Newer ones have either that or a Tyre Pressure Monitor with sensors in the wheels, depending on spec. Both are reset the same way.
- Set all four tyres to the correct cold pressure.
- On the centre display, go to My MINI (or Vehicle info) > Vehicle status > Tyre Pressure Monitor (or Flat Tyre Monitor).
- Start the engine but don't drive off, then select Perform reset.
- Drive away. It completes on its own after a short spell above about 19 mph.
2007–2013 MINI (R56)
- With the engine running, press the button on the indicator stalk until SET/INFO shows, then hold it.
- Click through to the tyre symbol with RESET and hold until a tick appears, then drive for a few minutes.
When to reset: Reset after any pressure change or wheel change.
NissanSensors in the wheels
Current UK Nissans (Qashqai from 2021, Juke from 2019, X-Trail) have sensors in the wheels, so there's normally no reset to do.
- Inflate all four tyres to the recommended cold pressure.
- Drive above 16 mph. The light should go out by itself.
- If the outside temperature is very different from when the system was last set, calibrate it: Settings > Tyre Pressures > Calibrate on the dashboard display.
When to reset: No reset needed after inflating. After rotating tyres or fitting new wheels, drive a few minutes at a steady 16–64 mph so it learns the positions.
PeugeotNo sensors: needs a reset
Most UK Peugeots from about 2013 (208, 2008, 308, 3008, 5008 and current models) use an indirect under-inflation detection system that compares wheel speeds, so it has to be reset after setting the pressures. Some older Peugeots had sensors in the valves.
- Set all four tyres to the label pressures, cold, suited to the load.
- Switch the ignition on, staying parked.
- On the touchscreen, open the Driving (or Vehicle) menu and choose Under-inflation initialisation; on the newest i-Connect screens it's Settings > Vehicle > Safety > Tire Pressure Setup.
- Confirm with Yes. A message and a beep confirm it.
Cars without a touchscreen
- Press and hold the under-inflation reset button on the dashboard for about 3 seconds until it beeps.
- On the Peugeot 108, the button is in the glovebox: press it until the warning lamp flashes 3 times.
When to reset: Reset after every pressure adjustment or wheel change. The warning won't clear by itself.
RenaultDepends on model
It varies by model and version. Many recent Renaults (Clio IV phase 2 and Clio V, Captur II and others) use an indirect tyre pressure loss warning; many from the 2000s and 2010s, and some current ones, have sensors in the valves. Both are reset from the dashboard.
- Set all four tyres to the door-edge label pressures, cold.
- Switch the ignition on, stopped.
- Using the steering-wheel switch, go to the Vehicle tab on the dashboard display and find the tyre pressure reset ('Reset tyre pressure press and hold' or 'Tyre pressure init. long press').
- Press and hold OK until 'Operation completed' appears. On cars with a touchscreen it's under Vehicle > Tyre pressure > Reset.
Cars with sensors
- On the Vehicle tab, open the Tyre Pressure page and hold the switch for about 3 seconds until 'Learning Tyre Pressures' shows, then drive for a few minutes.
When to reset: Reset after re-inflating, changing pressures, changing or swapping wheels, or using the spare or repair kit.
SEATNo sensors: needs a reset
SEATs use an indirect system that compares wheel speeds through the ABS, so it has to be recalibrated after the pressures are set.
- Set all four tyres to the correct cold pressure, with the car parked.
- Switch the ignition on.
- On the touchscreen, go to Vehicle > Settings > Tyres (on some models Vehicle status > Tyre pressure control).
- Press SET. A message, a short flash of the light and a tone confirm it.
Older models
- Cars without a touchscreen have a tyre button, either on the centre console or in the glovebox: hold it until it beeps.
When to reset: Recalibrate after any pressure change or wheel change, including swapping front and rear. The system then learns over a longer drive.
SkodaNo sensors: needs a reset
Skodas generally use an indirect system (the tyre pressure loss indicator) that compares wheel speeds through the ABS, so you need to store the pressures after setting them.
- Set all four tyres to the prescribed cold pressure.
- Switch the ignition on.
- Press CAR on the touchscreen, then Vehicle status.
- Choose Tyre Pressure Loss Indicator, press SET and follow the instructions. A message confirms the pressures are stored.
Older models with a button
- With the ignition on, press and hold the tyre-symbol SET button on the centre console until it beeps and the light goes out.
When to reset: Store the pressures after every adjustment or wheel change. Skoda also suggests re-storing them once a year.
SuzukiSensors in the wheels
Suzukis with a warning system (Swift, Vitara, S-Cross, Ignis, Jimny and others) mostly have sensors in the wheels.
- Inflate all four tyres to the cold pressure on the door-pillar label.
- Drive at a steady speed, around 15 mph or more. The warning should clear without any button.
When to reset: No reset needed. After new wheels or sensors, allow 15–20 minutes of steady driving.
We couldn't check an official Suzuki UK handbook for this, so do check yours.
TeslaDepends on model
Most Teslas have sensors in the wheels and show each tyre's pressure on the touchscreen; some newer Model 3 and Model Y cars use an indirect system that only warns. If you can see pressures under Controls > Service, yours has sensors.
- Inflate all four tyres to the door-pillar label pressure, cold.
- Cars with sensors: drive over 15 mph and the warning clears within about 10 minutes.
- Indirect cars: go to Controls > Service > Tire Pressure > Calibrate Tire Pressure, then drive for at least 20 minutes over 15 mph.
When to reset: After fitting different wheels, choose them under Controls > Service > Wheel & Tire > Wheels.
ToyotaSensors in the wheels
Almost all UK Toyotas since 2014 have sensors in the wheels, but Toyota's system compares readings with the pressures stored when it was last set up, so it needs telling when the pressures are right.
- Set all four tyres to the cold pressure on the door-pillar label.
- Turn the ignition on.
- Newer models (Aygo X, Yaris, Corolla, C-HR, RAV4 and others): using the steering-wheel buttons, open Vehicle Settings on the dashboard display, choose the tyre pressure item and follow the instructions to set it.
- Older models: press and hold the small SET button under the dashboard until the warning light blinks slowly 3 times, then leave the ignition on for a few minutes.
When to reset: Set it up again after inflating under-inflated tyres, changing tyres, or changing the specified pressures. Readings may take a short drive to update.
VauxhallDepends on model
It depends on the age. Most Vauxhalls from about 2009 to 2019 (Astra J and K, Insignia, Zafira, Mokka) have sensors in the wheels and show the live pressure of each tyre. Newer ones built with Peugeot parts (Corsa from 2019, Mokka from 2021, Astra from 2022, Crossland, Grandland) use an indirect deflation detection system that needs a reset.
- Newer models: set all four tyres to the correct cold pressure and apply the parking brake.
- Reset the tyre deflation detection through the Info Display settings, or by pressing the tyre-symbol button on cars that have one.
- Wait for the pop-up confirming the reset, then drive. It recalibrates over a longer drive.
Cars with sensors in the wheels (about 2009–2019)
- There's no reset to do. Set the correct cold pressures and drive; the warning clears once the sensors read the right pressure.
- You can check each tyre in the Vehicle Information menu.
- After changing or swapping wheels, leave the car parked for about 20 minutes, then drive. Relearning takes up to 10 minutes above 12 mph.
When to reset: Newer (indirect) models: reset after every pressure or wheel change. Sensor models: no reset needed.
VolkswagenNo sensors: needs a reset
Most UK Volkswagens (Polo, Golf, T-Roc, Tiguan and others) use an indirect system, which VW calls the tyre pressure loss indicator. It watches wheel speeds through the ABS rather than measuring pressure, so it has to be told when the pressures are right. A few larger models, such as the Touareg, have sensors in the wheels instead.
- Set all four tyres to the correct cold pressure for your load (the label is inside the fuel flap).
- Switch the ignition on and stay parked.
- On the touchscreen, press CAR (or Vehicle), open the vehicle settings and choose Tyres.
- Press SET, then Confirm to store the pressures.
- Drive normally. The system finishes learning over a longer drive at varied speeds.
Older models with a button
- With the pressures set and the ignition on, press and hold the SET button with the tyre symbol until it beeps. It's usually by the gear lever; on some Polos it's in the passenger-side storage tray.
When to reset: Store the pressures every time you adjust them or change or swap wheels. The light won't clear on its own.
VolvoNo sensors: needs a reset
Most Volvos use an indirect system that has to be calibrated after setting the pressures. Some 2012–2016 cars had sensors in the wheels instead.
- Switch off and set all four tyres to the door-pillar label pressures, cold.
- Start the car, staying parked.
- On the centre screen, open the Car Status app, go to the TPMS (or Status) tab and press Calibrate. On some years it's Settings > My Car > IntelliSafe > Calibrate Tyre Pressure.
- Confirm all four tyres have been checked, then drive. The tyre icons turn from grey to green when it's done, usually within 10 minutes above 20 mph.
Older models (about 2012–2016)
- With the ignition on (engine off on sensor cars), go to MY CAR > Calibrate tyre pressure and press OK, then drive.
When to reset: Calibrate every time you change a tyre pressure or a tyre, including switching to the heavy-load pressures.
If the light won't go out
- Check the pressures again, cold, against the right figures for your car and load. Then reset again if your car needs it.
- Look for a slow puncture. If the light comes back within days, one tyre is probably leaking: a nail, a valve or a corroded wheel rim. Here's how to track it down.
- Flashing then steady means the system has a fault. Sensors have batteries that typically last five to ten years, and a wheel without a sensor (a spare, or winter wheels that were never set up) will trigger it too. A garage or tyre fitter can read the sensors and fix it.