Reinitialise the Electric Windows

If the one-touch (auto up/down) windows stop working on your Kia Niro Mk2 (SG2, 2022–present) — usually after the 12 V supply was disconnected or went flat — the window motor has lost its learned end-stops and anti-pinch reference. Re-teaching it takes seconds per door, no tools.

The Niro’s windows offer express one-touch operation — a single tap runs the glass fully up or down — plus anti-pinch protection that reverses the window if something is trapped as it closes. Both features need the door module to know exactly where the fully-closed point sits. As a hybrid and plug-in hybrid, the Niro still runs its body electronics from a conventional 12 V battery, and it is that supply which holds the learned window limits. If the 12 V is disconnected or drops flat, the memory clears and express mode drops out. This is normal, not a fault, and is fixed by teaching the limits back in.

How It Works on This Model

The window controller remembers the fully-closed position so one-touch can stop correctly and the safety auto-reverse can work. A power interruption clears that memory, leaving only hold-to-move operation. Note that it is the low-voltage 12 V system, not the high-voltage traction battery, that powers the windows — so any 12 V disconnect, jump, or flat-battery event is what wipes the learned limits and calls for this re-initialise.

Before You Start

• Sit in the car with the door closed so the glass reaches its true top.
• Switch the ignition on (ready/on state; the engine need not be running).
• Work on one window at a time from its own switch.
• Keep hands and objects clear of the glass path.
• If the 12 V was just reconnected, confirm it is charged and holding before you start.

How to Re-initialise a Window

1. Sit in the car with the door closed and the ignition on.
2. Pull the switch up to fully close the window and keep holding for about 2–3 seconds after it stops.
3. Release, then push the switch down to fully open and hold a moment at the bottom.
4. Pull up again to fully close and hold for a couple of seconds at the top.
5. Release and test one-touch up and down — it should now run on its own.

Repeat for each affected window using its own switch.

If One-Touch Still Doesn’t Work

• Hold a little longer at the fully-closed stop — the controller needs to register the top limit.
• Make sure the door is shut and the 12 V battery is healthy during the learn.
• Run the whole up-down-up cycle again — one pass sometimes only part-teaches the stops.
• Check the relevant window fuse if a switch is completely dead rather than just un-learned.
• Watch for a window that stops short of the top — a dirty channel or tight seal can prevent it reaching the true closed point.
• Use each rear door’s own switch, not just the driver’s master panel, if a rear window won’t take the learn.
• A persistent failure after a clean attempt can mean a worn regulator or switch — any stored fault can be checked on autodtcs.com.

What to Expect After

With the limits relearned, a single tap should run the window fully up or down on its own, and anti-pinch auto-reverse is active again. The learned position is stored, so it stays set until the 12 V supply is next interrupted. Since a hybrid can flatten its 12 V battery if left standing a long time, it is worth knowing this quick routine for the future.

Frequently Asked Questions

Why did my Niro windows stop going up automatically?

A 12 V disconnect or a flat 12 V battery wiped the learned fully-closed position, so the door module reverts to hold-to-move only. The glass still runs while you hold the switch, but express one-touch and anti-pinch stay off until you re-initialise the window with the short hold routine.

How do I reset the auto window on a Kia Niro?

With the ignition on and the door shut, hold the switch up to fully close and keep holding 2–3 seconds; if needed, fully open and then fully close again, holding at the top. That re-teaches the end limits, restoring one-touch and anti-pinch. Repeat on each affected door from its own switch.

Does the high-voltage battery affect the windows?

No — the windows run from the 12 V system, the same as on a petrol car. The traction battery drives the wheels only. So it is a 12 V disconnect, jump-start, or flat 12 V that wipes the window memory, and this re-initialise is what restores it.

Do I have to do every window?

Only the ones with one-touch that have lost it. If just the driver’s window is affected, re-teach that one. Where the passenger and rear windows also have express operation and dropped it after the power loss, run the same routine at each of those switches.

Do I need a tool?

No — it is done entirely from the window switches. There is no dashboard menu, code, or diagnostic scanner needed for the basic re-initialise; you only need the ignition on and a few seconds at each door.

The window rises a little then stops or drops — is it broken?

Usually not. Without a learned top limit the anti-pinch system treats the travel as an obstruction and halts or reverses the glass. Completing the full up-down-up hold routine gives the module a valid closed position, after which the window runs to the top normally.

This is the step most owners miss after battery work — see our Niro battery guide. For warning lights, look up the code on autodtcs.com.