Learn how to activate EPB Service Mode on your Hyundai i20 for brake pad replacement. Step-by-step manual button method and scan tool instructions for all models.

How to Put Hyundai i20 into EPB Service Mode (Quick & Safe Guide)

Last Updated: June 27, 2026

Quick Answer: Activating EPB Service Mode in a Hyundai i20

To put the Hyundai i20 into EPB (Electronic Parking Brake) Service Mode for brake pad or caliper replacement, you typically do not need a scan tool on most recent models (2020+). Use the manual button method: Turn the ignition ON (engine off), press and hold the BRAKE pedal, press the EPB switch DOWN (release) for 5–10 seconds, then press the EPB switch UP (apply) for 5–10 seconds. The dash will show "EPB Service Mode" or the warning light will flash. Verify the rear calipers are fully retracted before beginning work.

Understanding Your i20's EPB: Why Service Mode Matters

What Is EPB Service Mode? (The "Maintenance Position")

The Electronic Parking Brake on the Hyundai i20 is an electrically operated system. Unlike traditional handbrakes that use a cable, the EPB uses a small electric motor mounted directly on each rear caliper. When you press the EPB button, these motors spin, pushing the brake piston against the pads to lock the rear wheels.

Service Mode — sometimes called "Maintenance Position" — is a software command that tells the EPB control module to fully retract the rear caliper pistons. This creates enough clearance to push the caliper off the rotor and replace the brake pads or rotor without damaging the motor or the piston seal. Think of it as putting the EPB system into a safe, relaxed state for mechanical work.

What Happens if You Skip This Step?

Skipping the Service Mode step can lead to several frustrating and costly problems:

Risk of damaging the caliper motor: Forcing the caliper piston back without retracting it electronically can strip the plastic gear inside the motor assembly. This means a full caliper replacement instead of a simple pad swap.
Error codes and warning lights: The EPB control module monitors piston position. If it detects that the piston moved without its command, it triggers a fault code like C1622 or C1625. These codes will keep the parking brake warning light on and may disable the system entirely.
Inability to retract the rear pistons: Many modern EPB calipers have a worm-drive mechanism that physically prevents manual retraction. If you try to push the piston back with a clamp or tool, it simply won't budge. You have no choice but to activate Service Mode.

Which Hyundai i20 Models Need This?

The i20 has gone through several generations, and the EPB procedure differs slightly depending on which one you own.

Generation	Model Code	Years	EPB Procedure
3rd Gen	GB	2014–2020	Manual button method (works on most) or scan tool
4th Gen	BC3 / Bi3	2020–Present	Manual button method (standard), scan tool rarely needed

The GB (3rd Gen) models are more likely to require a scan tool if the button sequence fails, especially on earlier production years. The BC3 / Bi3 (4th Gen) models almost always respond to the manual button procedure, saving you the cost of a diagnostic tool.

Prerequisites & Safety First

Tools You Will Need

Before you begin, gather the following items. This process is straightforward, but having the right tools makes it go smoothly:

OBD-II scan tool (only if the manual method fails or you need to calibrate after service)
Wheel chocks (placed in front of the two front tires)
Jack and jack stands (do not rely on the scissor jack alone)
Lug wrench or torque wrench
Flat-blade screwdriver or trim tool (for prying off EPB switch trim if needed)
A fully charged battery or battery charger connected (low voltage is the #1 reason the procedure fails)

Critical Safety Warnings

Working on a vehicle's braking system carries inherent risk. Follow these safety rules without exception:

Confirm the vehicle is on level ground. Never attempt this procedure on an incline. The EPB will not release if the vehicle detects an unsafe slope.
Chock the front wheels securely. Even with the EPB in Service Mode, the front wheels remain free. A rolling vehicle can crush you.
Never cut or force the caliper motor wires. The EPB motor wires carry control signals. Cutting them or pulling on them can short the module and require expensive repairs. If the caliper won't retract, stop and troubleshoot — do not force it.
Disconnect the battery if performing electrical work near the calipers. Sparks near brake fluid can ignite.

Method 1: The Manual Button Procedure (Most Common)

This is the method that works on the vast majority of Hyundai i20 models, especially from 2015 onward. It requires no tools — just your hands and patience.

Step 1: Prepare the Vehicle (Ignition & Pedals)

Park the i20 on level ground and chock the front wheels.
Enter the driver's seat and close the door (some models require the door closed and the seatbelt fastened).
Turn the ignition to the ON position. Do not start the engine. The dashboard lights should all illuminate, including the EPB warning light.
Press and hold the brake pedal down firmly. Keep it held throughout the entire sequence.

Step 2: The Button Sequence (A Step-by-Step Walkthrough)

This sequence is very specific. Do it exactly as described:

With the brake pedal still pressed, locate the EPB switch on the center console (between the front seats).
Press the EPB switch DOWN (the RELEASE position — the button end with the "P" and the arrow pointing downward). Hold it there for 5 to 10 seconds. You may hear a faint whirring sound from the rear calipers.
Without releasing the brake pedal, lift the EPB switch UP (the APPLY position — the button end with the "P" and the arrow pointing upward). Hold it there for 5 to 10 seconds.

Step 3: Confirm Activation (What to Look For)

After completing the sequence, release the EPB switch but keep the brake pedal pressed. Look for any of these confirmation signals on the dashboard:

A message reading "EPB Service Mode" or "Service Mode"
The EPB warning light (the "P" in a circle with brackets) begins to flash slowly
An audible "click" from both rear calipers as the pistons retract

If you see or hear any of these, Service Mode is active. You can now release the brake pedal, turn the ignition off, and begin your brake work.

Step 4: Exiting Service Mode

After you have replaced the brake pads or rotors and reassembled the rear brakes, you need to exit Service Mode so the EPB returns to normal operation. Here is how:

Turn the ignition back to the ON position (engine off).
Press the brake pedal.
Press the EPB switch DOWN (RELEASE position) once. The dashboard message will disappear, and you will hear the calipers extend to their normal resting position.
Turn the ignition off.

The system automatically recalibrates when you first apply the EPB after exiting Service Mode. However, if you want to be thorough, do this final test: start the engine, press the EPB switch UP to engage the parking brake, then press it DOWN to release it. The dashboard light should go out cleanly.

Method 2: Using a Scan Tool (For Stubborn Systems or Older Models)

Why a Scan Tool Might Be Necessary

The manual button method works on most i20 models, but not all. Some vehicles, particularly early GB-generation cars (2014–2016), may ignore the button sequence entirely. In other cases, the manual method might activate Service Mode but the system refuses to exit, leaving the EPB warning light permanently flashing. For these situations, a bidirectional scan tool is your remedy.

Compatible Tools

Any professional-grade OBD-II scan tool that supports EPB functions will work. Popular brands that cover the Hyundai i20 include:

Autel (MaxiCOM or AutoLink series)
Launch (X431 or CRP series)
OBDSTAR (X300 or MS series)
Foxwell (NT or GT series)

Consumer-grade code readers that only read and clear codes — typically the $30–50 models — will not work for this procedure. You need a tool that can send commands to the brake system module.

Step-by-Step Tool Procedure

Here is how to use a scan tool to put the i20 into Service Mode:

Connect the scan tool to the OBD-II port located under the dashboard on the driver's side. Turn the ignition ON (engine off).
Navigate the tool's menu to "Brake System" or "Parking Brake" — the exact wording depends on the brand.
Select "Service Mode", "Brake Pad Change", or "Maintenance Position". Some tools call it "Retract Pistons."
Follow the on-screen prompts. The tool will ask you to confirm that the vehicle is on level ground and the parking brake is released. Press "Yes" or "OK."
The tool will send the retraction command. You should hear the rear calipers retract with a clear clicking sound.
Once the procedure is complete, the tool will display a confirmation message. Turn the ignition off and begin your brake work.

To exit Service Mode using a scan tool, simply reconnect the tool, navigate back to the same menu, and select "Exit Service Mode" or "Calibrate EPB." The tool will run a calibration routine that resets the caliper position and clears any temporary fault codes.

When to Try Method 1 First (Save Time)

A scan tool can cost anywhere from $200 to over $1,000. If you own one, great — use it. But if you do not, always try the manual button method first. It takes less than a minute and costs nothing. Only reach for a scan tool if:

The button sequence produces no result after three attempts.
The dashboard shows no message or flashing light.
Your i20 is a 2014–2016 model and you suspect the EPB module is not responding.

Troubleshooting: My EPB Won't Go Into Service Mode

Problem 1: Button Sequence Doesn't Work

Solution: The most common culprit is low battery voltage. The EPB module requires at least 12.3 volts to respond. Connect a battery charger or jumper another vehicle. Also, try closing the driver's door and fastening the seatbelt — some models require these conditions before the module accepts the command. If none of this works, the module may be in a fault state that only a scan tool can clear.

Problem 2: "Service Mode" Message Doesn't Appear

Solution: Double-check the button order. It is easy to press the EPB switch UP first by accident. The sequence is always DOWN first (release), then UP (apply). If you reverse it, nothing happens. Start over and be deliberate about the order.

Problem 3: Caliper Won't Retract After Activation

Solution: Even with Service Mode active, a seized caliper guide pin can prevent the caliper from sliding off the rotor. The piston retracts, but the caliper itself is stuck. Use a pry bar gently to free the caliper. Do not pry on the piston boot. If the caliper still does not move, the slide pins are corroded and need replacement. In severe cases, the entire caliper bracket may need replacing.

Problem 4: Error Codes (e.g., C1622 or C1625) After Exiting

Solution: These codes indicate a caliper motor position error. They often appear after a successful Service Mode exit if the battery voltage dropped during the sequence. Charge the battery fully, then use a scan tool to run a "Calibration" or "Initiation" routine. This resets the motor position learning values. After calibration, clear the codes, and the warning light should turn off.

Frequently Asked Questions (FAQ)

Do I need a computer to put my Hyundai i20 in EPB service mode?

No. Most i20 models (2015 and later) allow you to activate Service Mode using the EPB switch on the center console with no computer or scan tool required. Only older models or vehicles with a fault in the EPB system need a diagnostic tool.

Can I put my 2020+ i20 in service mode without a scan tool?

Yes. The 4th generation i20 (BC3 / Bi3, 2020–present) reliably responds to the manual button method. You do not need a scan tool for routine brake pad replacement on these models.

What happens if I drive with the EPB in service mode?

If you try to drive with Service Mode active, the rear calipers are fully retracted, meaning the parking brake cannot engage. You will have no parking brake function. Additionally, the dashboard warning light will flash constantly, which is distracting. Always exit Service Mode before driving.

How do I know if my i20 has the "manual" service mode?

Check the owner's manual or simply try the button sequence. If the dashboard displays "EPB Service Mode" after holding the EPB switch down then up, your car supports the manual method. If nothing happens after three tries, your model likely requires a scan tool.

Why won't my EPB release after changing the rear brakes?

This typically happens if you exited Service Mode before fully reassembling the brake calipers, or if the battery voltage dropped during the procedure. Reconnect a scan tool and run the calibration routine. That usually resolves the issue.

Is it safe to push the rear pistons back without service mode?

No. Do not attempt to force the EPB caliper pistons back with a clamp, C-clamp, or brake piston tool. The internal worm-drive mechanism is delicate and will break if forced. Always activate Service Mode to retract the pistons electrically.

Does the battery need to be fully charged for this to work?

Yes. A weak battery is the single most common reason the manual button sequence fails. The EPB module uses electric motors that draw significant current. If the battery voltage is below 12.3 volts, the module may ignore the button command entirely.

Can I do this with the engine running?

No. Turn the ignition to the ON position but do not start the engine. Having the engine running can interfere with the EPB module's communication and may cause unexpected behavior.

My EPB switch is stuck – what should I do?

If the EPB switch is physically stuck or broken, you cannot use the manual button method. You will need a scan tool to activate Service Mode. In the meantime, inspect the switch for debris or damage. If it is broken, replace the switch assembly before attempting to service the brakes.

Is there a fuse I can pull to disable the EPB temporarily?

Pulling the EPB fuse is not recommended. It does not activate Service Mode — it simply cuts power to the module. The calipers will remain in whatever position they were in when the fuse was pulled. Removing the fuse with the brake engaged will lock the rear wheels. Removing it with the brake disengaged will leave the calipers retracted, but the system will be in an uncalibrated state that requires a scan tool to recover.

Final Check: Before You Drive Away

After you have completed the brake work and exited Service Mode, perform these final checks to ensure everything is working correctly:

Re-install both rear wheels and torque the lug nuts to the manufacturer's specification (typically 80–100 Nm for the i20, but check your owner's manual).
Turn the ignition to the ON position.
Press the EPB switch DOWN to release the parking brake. You should hear a clear mechanical release sound.
Press the EPB switch UP to engage the parking brake. Hold it for 2 seconds. The dashboard "P" light should illuminate solidly.
Press the EPB switch DOWN again to release. The light should go out.
Confirm the dashboard warning light turns off completely. If it remains on or flashes, a fault is present. Do not drive until it is resolved.
Take a short test drive