These instructions apply to the SsangYong Rexton Mk3 (Y400) 2017-2022.
For other models, please choose your vehicle here.
If the tyre-pressure warning has come on in your SsangYong Rexton (Y400, 2017–2022) after you’ve adjusted the pressures or changed a wheel, the system relearns by driving — there’s no button to press. This is normal behaviour rather than a fault: the lamp stays lit until the Rexton has settled at the corrected pressures and confirmed them over a short run. Get all four tyres right first and a couple of minutes on the road does the rest.
How the System Works on This Model
The Rexton monitors the pressure at each wheel and compares it with a stored reference. When a tyre drops too low, or when you deliberately change the pressures, the warning lights and holds until the system has read the new values and locked them in. Because there’s no reset button, the relearn is triggered simply by inflating correctly and driving — which also means the car will accept whatever pressures it finds, so it’s worth getting them exact before you set off.
Getting Ready
- Check the tyres cold, before driving or after only a short distance, so the readings aren’t inflated by heat.
- Use the placard figures on the driver’s door pillar for the load you’re carrying — a heavily loaded Rexton takes higher rear pressures.
- Set all four corners, and the full-size spare if it carries a sensor.
- Use an accurate gauge; forecourt airlines can be a psi or two out.
- Refit every valve cap so nothing leaks back out during the drive.
Completing the Procedure
- Park level and set all four tyres to the correct cold pressures.
- With the vehicle stationary, wait about 5 minutes.
- Start the engine and drive for about 2 minutes at over 20 km/h (12 mph).
- The new pressures are stored and the warning clears.
If the Warning Stays On
- Recheck every tyre — one corner still below spec keeps the lamp lit even if the rest are perfect.
- Complete the learn drive — a very short crawl may not be enough; give it a clear couple of minutes above 20 km/h.
- Just fitted different wheels? The system needs the stationary wait then the drive to relearn the new set.
- Cold morning? Pressures fall about 1 psi per 5 °C drop, which can trip the warning overnight; top up to the cold figure.
- Watch for a slow puncture — a tyre that keeps needing air should be inspected rather than repeatedly reset.
- Correct pressures but still lit? A sensor may have a flat battery or fault — look up any stored code on autodtcs.com.
What Happens Next
Once the corrected pressures are stored, the warning goes out and stays off for the trip and afterwards. A light that briefly returns on a very cold morning and clears as the tyres warm is normal thermal behaviour. A lamp that comes back on every drive, though, points to a genuinely low tyre or a failing sensor and is worth checking rather than resetting again.
Frequently Asked Questions
How do I reset the tyre pressure light on a SsangYong Rexton?
Set all four pressures correctly to the cold placard figures, wait about 5 minutes with the vehicle stationary, then drive for about 2 minutes above 20 km/h. There’s no button — the wait and the short drive are what let the system store the new values and clear the lamp.
Is there a reset button?
No — the system relearns automatically as you drive. Unlike some cars there’s no menu item or dash button to store the pressures manually; you inflate to spec, wait, and drive, and the Rexton takes care of the rest.
Do I need a tool?
Not for a normal relearn. Adjusting pressures or swapping wheels needs only a gauge and the short drive described above. A dedicated tool is only needed when new pressure sensors are fitted and have to be registered to the vehicle.
How long is the learn drive?
About 2 minutes above 20 km/h, after a 5-minute stationary wait with the vehicle at rest. If the warning hasn’t cleared by the end of that, recheck the pressures cold rather than driving on and hoping — a tyre that’s still low will keep the lamp on.
Why did the light come on in cold weather?
Tyre pressure falls as the air inside cools, so a Rexton set correctly in mild conditions can read low after a cold night and trip the warning. Top the tyres back up to the cold placard figure, then complete the wait and short drive and the light should clear.
Is it safe to keep driving with the light on?
Take it as a prompt to check the tyres soon rather than a reason to stop immediately, but don’t leave it. A steady warning often means one tyre is genuinely low, which hurts grip, braking and economy — and on a heavy SUV that matters. Check all four and reset once they’re correct.
If the warning came on together with other lights, decode the code on autodtcs.com.
Independent guide — not affiliated with SsangYong. Always follow your official service manual and safety precautions. Read our full disclaimer.