what does it mean if my Tesla Model 3 Highland (2024-present) has C1234 error code?

Solution

1. Preparation

• Tools Required: OBD-II scanner with Tesla compatibility, multimeter, brake fluid, cleaning supplies, torque wrench.
• Safety Warnings: Disconnect the 12V battery before working on electrical components. Allow the vehicle to cool before inspecting brake components.

2. Check Brake Fluid Level

• Sub-steps:
  1. Open the front trunk and locate the brake fluid reservoir.
  2. Inspect the fluid level; it should be between the minimum and maximum marks on the reservoir.
  3. If low, top off with the recommended brake fluid type (consult owner’s manual).

3. Inspect Brake Components

• Sub-steps:
  1. Remove the wheel to access the brake assembly.
  2. Check the condition of brake pads and rotors for wear or uneven surfaces.
  3. Ensure calipers are functioning properly and not seized.
  4. Replace any worn or damaged components as necessary.

4. Clean Wheel Speed Sensors

• Sub-steps:
  1. Locate the wheel speed sensors on each wheel.
  2. Clean the sensors using a non-abrasive cleaner to remove any debris or corrosion.
  3. Reconnect any loose or corroded connectors.

5. Test Wiring and Connectors

• Sub-steps:
  1. Use a multimeter to check for continuity in ABS wiring.
  2. Inspect connectors for corrosion or loose connections.
  3. Repair or replace any damaged wiring or connectors.

6. Update Vehicle Software

• Sub-steps:
  1. Connect the vehicle to a Wi-Fi network.
  2. Navigate to the software update section in the vehicle display.
  3. Follow on-screen instructions to install any available updates.