why does my Toyota Highlander XU70 (2020-Present) show B1442 error code?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Recover Refrigerant

• Use a refrigerant recovery machine to safely recover any refrigerant from the AC system.
• Follow the manufacturer’s guidelines for refrigerant recovery procedures.

3. Replace Refrigerant Pressure Sensor

• Locate the refrigerant pressure sensor on the AC system (typically near the compressor).
• Disconnect the electrical connector from the sensor.
• Remove the sensor using a socket or wrench (note torque specifications for reinstallation).
• Install the new refrigerant pressure sensor and tighten to the specified torque.

4. Refill Refrigerant

• Recharge the AC system with the appropriate type and amount of refrigerant as per the manufacturer's specifications.
• Use a refrigerant scale to ensure the correct amount is added.

5. Reconnect Battery

• Reconnect the battery terminals securely.
• Start the vehicle and allow it to idle for a few minutes.

6. Clear Error Codes

• Use the OBD-II scanner to clear the B1442 error code and any related codes from the system.
• Perform a test drive to ensure that the AC system is functioning correctly.