how to fix C1201 error code in Porsche Cayenne E3 (2018-Present)?

Learn how to diagnose and fix C1201 brake issue in Porsche Cayenne E3. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle battery to ensure safety during the repair.
• Ensure the vehicle is on a level surface and use wheel chocks to prevent movement.

2. Access Brake Pressure Sensor

• Tools Required: Socket set, ratchet, and extension.
• Remove the engine cover if necessary to gain access to the brake pressure sensor.
• Locate the brake pressure sensor on the master cylinder.

3. Inspect and Replace Brake Pressure Sensor

• Disconnect the electrical connector from the brake pressure sensor.
• Remove the sensor using the appropriate socket.
• Tools Required: Torque wrench.
• Install the new brake pressure sensor and hand-tighten it first.
• Torque the sensor to the manufacturer's specifications (refer to service manual for exact torque values).
• Reconnect the electrical connector securely.

4. Bleed the Brake System

• If the brake fluid was low, it is imperative to bleed the brakes.
• Tools Required: Brake bleeder kit, brake fluid (Porsche-approved type).
• Start at the farthest brake caliper from the master cylinder, open the bleeder valve, and pump the brake pedal until no air bubbles are present.
• Repeat for all calipers, ensuring the brake fluid reservoir doesn't run dry during the process.

5. Final Checks

• Reconnect the vehicle battery.
• Clear the error codes using the OBD-II scanner.
• Start the vehicle and check for warning lights.