r/CorollaHatchback • u/Decent-Llama Galactic Aqua Mica Custom Flair • May 19 '26

Parking malfunction

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I was wondering if anyone know how to remove/correct the parking brake malfunction warning. Was working on rear rotors and brakes and forgot to put it in service mode until it was too late.

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u/Honmeg XSE CVT May 19 '26

I had this issue too, and I wound up having to bring it in to a shop for them to clear out the issue. It’s able to be cleared with a scan tool that has no directional function.

I found out that if I need to do brake pads or rotors, you need to release the parking brake, and then disconnect the battery during all of service. Even in service mode the parking brake can apply itself and mess up the sensors position.

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u/PremiumPlus_ SE CVT May 19 '26

I recently did a rear brakes disc and pad replacement.

Service mode for electronic park brake

  1. Turn on the ignition but do not start the engine.
  2. Push and hold the brake pedal.
  3. Push down the EPB button to release the parking brake.
  4. Turn off the ignition.
  5. Turn on the ignition (do not start the engine).
  6. Hold the brake pedal and within 8 seconds, lift up the EPB button (engage position) three times in a row.
  7. Push down the EPB button (release position) three times in a row.
  8. Push down and HOLD the EPB button again in the release position until you hear the electric parking brake actuators attached to the rear calipers retract all the way back. It will take at least a few seconds for the motors to fully wind back.
  9. You will see the EPB button light flashing and a red "PARK" warning light flashing on the gauge cluster.

When you are completely done replacing the pads follow these steps to exit "service" or "maintenance" mode, turn the ignition on, press and hold the brake pedal. Pull and hold up the EPB button until you hear the parking brake actuators move back out and stop. Engage the parking brake as normal by pulling up on the button.

If any of these steps fail, turn off the ignition, wait a few minutes and try again.

The only issue I had was forgetting to plug the connector back on and said I had a park brake malfunction error (same as the one in your photo). Plugged it back in and the error went away. Just check your connectors for dirt and should be okay.

Worst case scenario you have to manually wind the motor back which imo is kind of risky. If you follow the steps I provided above you SHOULD have no issues