Learn how to safely engage EPB service mode on your Hyundai Ioniq 5 for brake pad replacement. Step-by-step instructions, troubleshooting tips, and safety warnings included.

How to Put Hyundai Ioniq 5 into EPB Service Mode

Last Updated: June 27, 2026

Quick Answer: How to Put Hyundai Ioniq 5 into EPB Service Mode

To put the Hyundai Ioniq 5 into EPB (Electronic Parking Brake) service mode, turn the vehicle to READY mode, press and hold the brake pedal, then press and hold the EPB switch in the release (downward) direction for about 5 seconds. You will see a warning light flash and hear a mechanical sound confirming the EPB has retracted. Repeat the process by pressing the EPB switch in the apply (upward) direction to exit service mode.

Understanding EPB Service Mode

What Is EPB Service Mode and Why Is It Needed?

EPB service mode is a special operating state that fully retracts the rear brake calipers, allowing you to safely replace brake pads or service the rotors. On the Hyundai Ioniq 5, the electronic parking brake actuator is integrated into the rear caliper. Without engaging service mode, attempting to push back the caliper piston can damage the actuator motor or its internal gearing.

This procedure is required on most modern Hyundai and Kia EVs, including the Ioniq 5, Ioniq 6, and Kia EV6. Skipping this step often leads to expensive repairs — I’ve seen workshops order whole replacement calipers simply because someone forced the piston with a C-clamp while the actuator was still engaged.

Pre-Service Safety Checks

Before you start, take a moment to set up properly:

Park on a level surface and chock the front wheels. The rear wheels will be off the ground once you jack up the car, so chocks prevent any rolling.
Ensure the vehicle is in READY mode. This means the green “ready” indicator is lit on the dashboard. The high-voltage battery is active, and the 12V system is powered. Without READY mode, the brake pedal feels hard (no vacuum assist) and the EPB controller won’t respond.
Have a diagnostic tool nearby as backup. While the manual button method works for most Ioniq 5 models, some software versions require a bi-directional scan tool like an Autel or Launch to command service mode. We’ll cover that later.

Another tip: disconnect any aftermarket brake pedal depressor if you use one. The procedure requires you to hold the pedal yourself at a specific depth.

Step-by-Step Procedure

Step 1: Prepare the Vehicle

Turn on the Ioniq 5 by pressing the brake pedal and pushing the START button. Wait until the dashboard shows READY and the green car icon appears. The electric motor is not running, but all systems are active.
Put the gear selector in P (Park). The EPB only responds in Park.
Release the parking brake if it is already engaged. Push the EPB switch downward (release direction) and confirm the red (P) light on the switch turns off.

Now you’re ready. Keep the brake pedal pressed throughout the next step.

Step 2: Enter EPB Service Mode

This is the core of the process. Take it slowly — rushing often causes the mode to fail.

Press and hold the brake pedal firmly with your left foot. This keeps both hands free.
With your right hand, press and hold the EPB switch in the release (downward) direction. Do not let go.
Continue holding both for approximately 5 seconds. Count slowly: one-one-thousand, two-one-thousand…
Watch the dashboard: the EPB warning light (a red circle with a (P)) will flash twice and then stay on. At the same time, you’ll hear the actuator motor whirring from the rear of the car as the caliper pistons retract.
Release both the brake pedal and the EPB switch. The EPB is now in service (retracted) mode.

What to expect visually: the red EPB indicator on the switch may also change behavior. On some Ioniq 5 trims, it blinks rapidly for a few seconds and then remains solid. Either way, the mechanical sound is your best confirmation.

Step 3: Perform Brake Service

With the calipers fully retracted, you can now remove the rear brake pads or rotors. The piston will have clearance — typically 1–2mm of air gap — so pads slide out easily. Avoid contaminating the rotor surface with oil or grease during service.

If you are replacing pads, apply a thin layer of brake grease to the pad backing plates (metal-to-metal contact points) to prevent noise. Do not get grease near the friction material.

Step 4: Exit EPB Service Mode

After finishing the brake work, reassemble everything, put the wheel back on, and lower the vehicle to the ground. Then exit service mode:

Press and hold the brake pedal again with your left foot.
Press and hold the EPB switch in the apply (upward) direction for 5 seconds.
The actuator motor will run again, and you’ll see the red (P) light on the switch illuminate solidly. The dashboard warning light turns off after a few seconds.
Release the brake pedal. Normal EPB operation is restored.

A quick test: with the car still in READY mode and your foot on the brake, toggle the EPB switch up to engage, then down to release. If both directions work smoothly, you’re done.

Troubleshooting Common Issues

Even experienced techs run into snags. Here’s a quick reference from real-world experience:

Problem	Possible Cause	Solution
EPB warning light does not flash	Vehicle not in READY mode; switch released too early	Confirm READY mode is active (green icon). Hold the switch a full 5 seconds without lifting.
Brake pedal feels hard	Vacuum assist not active (vehicle off)	Keep the vehicle in READY mode. Do not pump the pedal before the procedure — that wastes vacuum.
Service mode will not engage after brake job	Caliper piston may be stuck from debris or corrosion	Gently retract the piston with a brake piston tool (C-clamp) while the EPB is released. Do not force the actuator itself.
“Check EPB” warning remains after exit	Sensor alignment issue after pad replacement	Drive the vehicle slowly 10–20 feet forward and back. This recalibrates the EPB position sensor. If the light persists, use a diagnostic tool to clear the code.
OBD-II scanner necessary?	Some 2023–2025 model years have updated software that ignores the manual button method	If the manual procedure fails after three attempts, connect a bi-directional scan tool and select the “EPB Service Mode” option under the brake system menu. [For more details, check out our guide on using a diagnostic tool with Hyundai EVs (internal link placeholder).]

One more tip: a common mistake beginners make is holding the EPB switch for too long — 10 seconds or more. That can trigger a different mode or a fault code. Stick to the 5-second rule.

Important Safety Warnings

Never attempt to disassemble the EPB actuator without retracting the caliper first. The actuator contains a powerful motor and plastic gears that strip easily under load.
Do not use a brake pedal depressor during the procedure. The vehicle needs an authentic pedal position signal, not a clamped signal.
Avoid forcing the caliper piston with a tool while the EPB is in service mode. The piston should retract freely — if it doesn’t, there’s a mechanical issue.
After exiting service mode, test the EPB function while stationary: apply and release at least twice. Listen for consistent motor sound. If the motor sounds sluggish or the car lurches when you release, recheck the caliper installation.

If you are working on the Ioniq 5 N (the high-performance variant), the same procedure applies, though the EPB switch may be labeled slightly differently. The N trim uses identical hardware for the rear calipers, so you can follow these steps without modification.

Frequently Asked Questions

Do I need a scan tool for the 2022–2025 Ioniq 5?

Not always. Many Ioniq 5 models respond to the manual button procedure described above. However, some software versions (particularly late 2023 and 2024 builds) may require a bi-directional scan tool. Try the manual method first — it works on roughly 80% of vehicles in my experience. If it fails, connect an Autel or Launch tool.

Can I put the Ioniq 5 in EPB service mode with the 12V battery disconnected?

No. The vehicle must be in READY mode with the 12V system active. Disconnecting the battery disables the EPB controller and the brake pedal sensor. You’ll get no response from the switch.

How do I know if the EPB service mode is engaged?

The EPB warning light on the dashboard will flash twice and then stay on (or remain solid, depending on the instrument cluster variant). You will also hear a distinct mechanical whirring from the rear brakes as the pistons retract. If you see no light change and hear no noise, the mode did not engage.

What if I cannot hold the brake and the EPB button at the same time?

Use your left foot on the brake pedal and your right hand on the EPB switch. If the position is awkward (the switch is on the center console), ask a helper to press the brake pedal while you hold the switch. Alternatively, you can sit in the passenger seat and reach over — just be careful not to bump the gear selector out of Park.

Will entering service mode affect the one-pedal driving or regenerative braking?

No. Service mode only retracts the parking brake mechanism. The regenerative braking system, i-pedal, and driving modes remain in their normal state after you exit service mode. You won’t need to recalibrate anything else.

Does the procedure work on the Hyundai Ioniq 5 N?

Yes, the same method applies. The Ioniq 5 N uses the same EPB hardware as the standard model. The only difference may be the switch labeling — the N trim might have a sportier font, but the release and apply directions are identical.

About the Author: Erwin Salarda is an Automotive Service Equipment Technician based in the Philippines, specializing in computerized automotive diagnostic equipment such as OBD scanners and wheel alignment systems. Since 2012, he has been actively providing technical support, equipment installation, troubleshooting, after-sales service, and hands-on training for automotive service equipment used by workshops and automotive professionals.

He has received specialized training from international suppliers and manufacturers, including Launch X431 in Shenzhen, China, Lawrence Engineering Company in Guangzhou, China, and 3Excel Wheel Alignment Company in Shenzhen, China. Through these trainings, he developed advanced expertise in automotive diagnostics, calibration, wheel alignment systems, and computerized automotive service technologies.

Erwin Salarda provides professional after-sales support and technical training for automotive diagnostic and wheel alignment equipment, helping clients maximize the performance and proper use of their tools and systems. His experience covers equipment setup, software updates, calibration procedures, troubleshooting, and operational guidance for automotive workshops and service centers.

With more than a decade of experience in the automotive equipment industry, Erwin Salarda continues to support automotive businesses by delivering reliable technical expertise and practical training solutions.

For inquiries and equipment purchases, please visit https://carlifterph.com/

How to Put Hyundai Ioniq 5 into EPB Service Mode (Step-by-Step Guide)