what should I do if my Ford F-150 Fourteenth Generation (2021-present) shows C1234 error code?

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the negative battery terminal for safety.

2. Inspect and Clean Wheel Speed Sensors

• Sub-steps:
  • Locate the wheel speed sensors at each wheel hub.
  • Remove any dirt or debris around the sensor area using a clean cloth or brush.
  • Disconnect the electrical connector from the wheel speed sensor.

3. Test and Replace Wheel Speed Sensors

• Sub-steps:
  • Use a multimeter to check the resistance of each sensor. Compare the readings to the manufacturer's specifications (typically around 1,000-2,500 ohms).
  • If a sensor is out of specification, remove the sensor by unscrewing it from its mounting location.
  • Install a new wheel speed sensor and tighten it to the manufacturer's torque specifications (usually around 10-15 Nm).

4. Reconnect and Test

• Sub-steps:
  • Reconnect the electrical connector to the wheel speed sensor.
  • Reconnect the negative battery terminal.
  • Clear the C1234 error code using the OBD-II scanner.
  • Test drive the vehicle to verify that the error code does not reappear and that the ABS and traction control systems function correctly.