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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety.

2. Inspect and Replace Wheel Speed Sensors

1. Locate the Wheel Speed Sensors:

   • Identify the position of each wheel speed sensor on the vehicle.

2. Remove the Wheel:

   • Use a socket set to loosen and remove the lug nuts.
   • Lift the vehicle with a jack and secure it on jack stands.

3. Disconnect the Sensor:

   • Locate the wheel speed sensor connector.
   • Gently disconnect the wiring harness from the sensor.

4. Remove the Old Sensor:

   • Unscrew the mounting bolt using the appropriate socket.
   • Carefully pull the sensor out of its housing.

5. Install New Sensor:

   • Insert the new wheel speed sensor into the housing.
   • Secure it with the mounting bolt, tightening to manufacturer specifications (usually around 8-12 Nm).

6. Reconnect Wiring:

   • Reattach the sensor connector ensuring a secure fit.

7. Reassemble the Wheel:

   • Place the wheel back on and hand-tighten the lug nuts.
   • Lower the vehicle and torque the lug nuts to manufacturer specifications (typically 100-120 Nm).

3. Clear Error Codes

• Reconnect the battery.
• Use the OBD-II scanner to clear the C1234 code from the system.