A/C Refrigerant Pressure Sensor B Circuit Intermittent/Erratic

Common symptoms

What you'll notice

• Check the wiring and connections to the A/C refrigerant pressure sensor
• Inspect and test the A/C refrigerant pressure sensor for any faults or malfunctions
• Verify the refrigerant pressure readings and ensure they fall within the specified range
• Clean or replace the A/C refrigerant pressure sensor if it is contaminated or damaged

Common causes

Most likely first

1. Faulty A/C refrigerant pressure sensor
2. Loose or corroded electrical connections to the A/C refrigerant pressure sensor
3. Low refrigerant level in the A/C system
4. Malfunctioning A/C compressor clutch
5. Faulty A/C refrigerant control valve

How to diagnose & fix

Work through it in order

1. A/C system may not cool or may blow warm air.
2. A/C compressor may not engage.
3. A/C system may cycle on and off frequently.
4. A/C system may not work at all.
5. A/C system may produce unusual or loud noises.