what does the B123 error code mean for my Honda Civic 10th Generation (2016-2021)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety during repairs.
• Allow the vehicle to cool down if it has been recently used.

2. Recover and Replace Refrigerant

• Tools Required: A/C recovery machine, manifold gauge set, vacuum pump.
• Recover refrigerant from the A/C system using the recovery machine.
• Check the manufacturer's specifications for the correct type and amount of refrigerant.
• Replace with new refrigerant as per specifications.

3. Inspect and Replace Components

• Tools Required: Socket set, wrenches, torque wrench.
• Inspect the A/C compressor visually. If damaged:
  • Disconnect electrical connectors and refrigerant lines.
  • Remove mounting bolts and take out the A/C compressor.
  • Install the new compressor, ensuring all connections are secure.
  • Torque bolts to the manufacturer's specifications.

4. Test System Functionality

• Tools Required: A/C manifold gauge, thermometer.
• Connect the manifold gauge to the service ports.
• Start the engine and turn on the A/C to check pressures.
• Use a thermometer to measure the outlet temperature; it should be within the manufacturer's specified range.