how to fix the C1201 code on my Toyota Corolla E170 (2013-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface with the engine off.
• Disconnect the battery to prevent electrical shorts.

2. Inspect Brake Fluid Level

• Open the hood and locate the brake master cylinder.
• Remove the cap and check fluid level.
  • If low, top off with the manufacturer-recommended brake fluid (DOT 3 or DOT 4).
• Reinstall the cap securely.

3. Check for Leaks

• Visually inspect all brake lines and connections for signs of fluid leakage.
• If leaks are found, identify the source and proceed to repair or replace the affected components.

4. Inspect Brake Actuator

• Remove any necessary panels to access the brake actuator.
• Inspect for physical damage or corrosion.
• If damaged, replace the brake actuator following these sub-steps:
  1. Disconnect the electrical connectors from the actuator.
  2. Remove the actuator mounting bolts using a socket set.
  3. Install the new actuator in reverse order.
  4. Torque the mounting bolts to the manufacturer's specifications.

5. Test Brake Pedal Switch

• Locate the brake pedal switch.
• Disconnect the connector and test the switch with a multimeter.
  • Check for continuity when the pedal is depressed.
• If faulty, replace the brake pedal switch.

6. Reconnect Battery and Reset Codes

• Reconnect the battery terminals.
• Use the OBD-II scanner to clear the C1201 code and any other stored codes.
• Start the vehicle and check for warning lights.