what does C1231 code mean in my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.
• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench.

2. Inspect and Replace Wheel Speed Sensor

a. Remove the Wheel

• Loosen the lug nuts slightly while the vehicle is on the ground.
• Lift the vehicle using a jack and secure it with jack stands.
• Fully remove the lug nuts and take off the wheel.

b. Access the Wheel Speed Sensor

• Locate the wheel speed sensor mounted on the brake assembly.
• Disconnect the electrical connector from the sensor.

c. Remove the Sensor

• Remove the retaining bolt(s) securing the wheel speed sensor.
• Carefully pull the sensor out of its mounting hole.

d. Install New Wheel Speed Sensor

• Insert the new wheel speed sensor into the mounting hole.
• Secure it with the retaining bolt(s) to the manufacturer's torque specifications.
• Reconnect the electrical connector.

3. Reassemble and Test

• Reinstall the wheel and hand-tighten the lug nuts.
• Lower the vehicle and fully tighten the lug nuts to the manufacturer’s specifications.
• Reconnect the battery and clear the diagnostic codes using the OBD-II scanner.