how to fix C1234 trouble code on Ford F-150 12th Generation (2009-2014)

Solution

1. Preparation

• Gather tools and parts.
• Ensure the vehicle is parked on a level surface.
• Disconnect the battery to prevent electrical shock.

2. Remove the Wheel

• Tools Required: Jack and jack stands, lug wrench.
• Lift the front of the vehicle using a jack and secure it with jack stands.
• Remove the left front wheel using a lug wrench.

3. Access the Wheel Speed Sensor

• Locate the left front wheel speed sensor, usually mounted near the brake caliper or hub assembly.
• Inspect the mounting bolts and remove them using a socket set.

4. Replace the Wheel Speed Sensor

• Disconnect the electrical connector from the sensor.
• Remove the old wheel speed sensor.
• Install the new sensor by reversing the removal steps.
• Ensure the sensor is seated properly and bolt it in place to the specified torque.

5. Reassemble

• Reconnect the electrical connector securely.
• Reinstall the left front wheel and tighten the lug nuts to the manufacturer's torque specification.
• Lower the vehicle from the jack stands.

6. Reset the System

• Tools Required: OBD-II scanner.
• Reconnect the battery.
• Use the OBD-II scanner to clear the C1234 code and any other related codes.