how to fix C1201 code in Toyota Corolla E170 (2013-2019)?

Solution

1. Preparation

• Gather tools and ensure you have the necessary replacement parts.
• Disconnect the battery to prevent electrical shorts.
• Raise the vehicle using appropriate jack stands to access the brake system safely.

2. Inspect and Replace Brake Pressure Sensor

• Sub-steps:
  1. Locate the brake pressure sensor on the brake master cylinder.
  2. Disconnect the electrical connector from the sensor.
  3. Remove the sensor from the master cylinder using a socket wrench (torque specifications may vary, refer to repair manual).
  4. Install the new brake pressure sensor carefully, ensuring it seals properly.
  5. Reconnect the electrical connector, ensuring it clicks into place securely.

3. Check and Refill Brake Fluid

• Sub-steps:
  1. Inspect the brake fluid reservoir for proper fluid level.
  2. If low, add the specified brake fluid (DOT 3 or DOT 4) until it reaches the full mark.
  3. Bleed the brake lines if air is suspected to be in the system.

4. Reconnect Battery and Clear Codes

• Sub-steps:
  1. Reconnect the battery terminals securely.
  2. Use the OBD-II scanner to clear the C1201 code and any other related codes.