how to fix the EPC light on my Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, multimeter, cleaning supplies (throttle body cleaner, cloths)
• Disconnect the negative terminal of the battery to ensure safety while working on electrical components.

2. Clean the Throttle Body

• Remove the air intake duct connected to the throttle body using a socket set.
• Spray throttle body cleaner onto a clean cloth and wipe the interior of the throttle body to remove any carbon buildup.
• Ensure that the throttle plate moves freely; manually open it to check if it sticks.
• Reinstall the air intake duct and reconnect it securely.

3. Inspect and Test Wiring

• Visually inspect the wiring harness and connectors leading to the throttle body and accelerator pedal position sensor for wear or damage.
• Use a multimeter to check continuity in the wiring. Repair or replace any damaged wires.

4. Check and Replace the Brake Light Switch (if necessary)

• Locate the brake light switch, usually found above the brake pedal.
• Test the switch for proper operation; it should engage and disengage correctly when the pedal is pressed.
• If faulty, remove the switch and replace it with a new one, ensuring it is adjusted correctly.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored error codes.
• Restart the vehicle and check if the EPC light remains off.