A/C Refrigerant Pressure Sensor B Circuit Range/Performance
A/C refrigerant pressure sensor B is electrically intact, but its reading does not match the system model — for example pressures that do not fall when the compressor is off, do not change with ambient temperature, or contradict pressure sensor A. Often a refrigerant charge issue or a contaminated sensor.
Affected components
- Ac pressure sensor b
- Refrigerant charge
Common causes
- High likelihood: Low refrigerant charge
- Medium likelihood: Contaminated or aged sensor diaphragm
- Low likelihood: Sensor element aged beyond calibration window
Diagnostic notes
- The malfunction indicator lamp may illuminate
Related codes
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.