These instructions apply to the Suzuki Swift Mk4 (A2L) 2017-Present.
For other models, please choose your vehicle here.
The tyre-pressure warning on a Suzuki Swift Mk4 (A2L, 2017–present) lights up when one or more tyres drop below the target pressure, and it clears by relearning as you drive once the pressures are correct. On its own the amber symbol is a reminder, not a fault — it simply means the system wants you to check and top up. Some Swifts also carry a cluster calibration step, which is handy if you regularly run at a heavier load. Here’s how to clear the light and make it stay off.
How It Works on This Model
Most Swift Mk4 variants use an indirect system: rather than a sensor inside each wheel, it watches the wheel-speed data from the ABS. A tyre losing air shrinks slightly and turns a touch faster than the others, and the software flags the odd one out. Because it learns from the tyres you set, it always needs a fresh reference after you inflate them — that is what the drive-based relearn does. The optional loaded/unloaded calibration simply tells the system what your normal reference pressure is.
Getting Ready
- Check the tyres cold — parked for a couple of hours, or driven less than a mile. Warm tyres read high and mask a slow leak.
- Inflate all four to the figure on the driver’s door-pillar label. One slightly low corner is enough to keep the light on.
- Use the higher loaded figure on the same label if you carry passengers or luggage regularly.
- Don’t forget to reset the pressure on any tyre you’ve just had off — a fitter may leave it high.
- Have the ignition and trip controls to hand if you plan to use the calibration menu.
Standard Reset (Relearn)
- Turn the ignition off.
- Wait about 20 minutes.
- Drive normally for about 10 minutes — the system reads the new pressures and the warning goes out.
Optional: Loaded/Unloaded Calibration
If your Swift offers it, you can tell the system whether the car is loaded:
- Park, check the tyre pressures, turn the ignition on.
- Open the trip menu and select ‘Check PCM Odometer’, then press and hold the set button for 5 seconds.
- Scroll to ‘TPMS’, choose ‘Loaded’ or ‘Unloaded’, and confirm until ‘SUCCESS’ appears.
If the Light Stays On
- Re-check every tyre with a known-good gauge, including the target for a full load.
- Look for one low corner — a slow puncture from a nail or a leaking valve will keep dropping the same tyre after each top-up.
- Cold morning? Pressure falls about 1 psi for every 5 °C drop, so a warm-weather setting can trip the light on the first frost.
- After a wheel swap or new tyres, redo the relearn so the new reference is stored.
- Check the space-saver or spare if it has been in use.
- A steady-flashing TPMS light means a sensor fault (flat sensor battery or an unmatched sensor after a wheel change) and needs a tyre shop’s tool.
What Happens Next
Once the pressures are right and the relearn drive is complete, the amber symbol goes out and stays off for the trip and beyond. If it only clears briefly and returns, treat that as a genuine leak rather than a glitch and have the tyre inspected.
Frequently Asked Questions
How do I reset the tyre pressure light on a Suzuki Swift?
Set all four pressures correctly while the tyres are cold, then turn the ignition off, wait about 20 minutes, and drive normally for about 10 minutes. The system relearns the new pressures during that drive and the amber warning goes out on its own.
What is the Loaded/Unloaded setting?
It is a calibration in the cluster trip menu that tells the TPMS your normal load. If you routinely run the higher fully-laden pressures, choosing ‘Loaded’ sets that as the reference so the system judges ‘low’ against the right figure and doesn’t warn unnecessarily.
Why won’t the light go out after pumping up the tyres?
Either a tyre is still slightly off the target, or the relearn drive hasn’t finished — give it a few miles at normal speed. If the light keeps returning, one corner is probably losing air through a nail or a leaking valve, which no reset will fix. A persistent flash points to a sensor fault instead.
How long does the relearn take?
Usually about ten minutes of ordinary driving after the ignition-off wait. Steady speeds on a smooth road help the system gather clean wheel-speed data; a lot of stop-start town driving can make it take a little longer to settle.
Does cold weather set the warning off?
Yes. Air contracts as it cools, so pressures set in mild weather can fall below target on a cold morning and trip the light. Top the tyres back up to the door-pillar figure when they’re cold and it should clear after a short drive.
Do I need a tool?
Not for a normal reset — the drive-based relearn is all that’s needed. A workshop tool is only required if a sensor was replaced or swapped between wheels, or if the light flashes to signal a sensor fault.
If a fault code is stored, look it up on autodtcs.com. To clear a service reminder, see our Swift Mk4 service reset.
Independent guide — not affiliated with Suzuki. Always follow your official service manual and safety precautions. Read our full disclaimer.