A/C Refrigerant Pressure Sensor "A" Circuit Low
A/C pressure sensor signal voltage below the lower threshold — open, short to ground, sensor fault, or a refrigerant charge so low that the pressure is genuinely low.
Affected components
- Ac pressure sensor
- Ac refrigerant
Common causes
- High likelihood: Refrigerant charge low
- Medium likelihood: Sensor circuit shorted to ground or open
- Low likelihood: Connector pins corroded - high contact resistance
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.