B1423 Code: Meaning, Causes, and Symptoms | OBD2 Codes

B1423 – Pressure Sensor Circuit


B1423 Possible Symptoms


Engine Light ON (or Service Engine Soon Warning Light)


B1423 Possible Causes


Faulty Pressure Sensor,Pressure Sensor harness is open or shorted,Pressure Sensor circuit poor electrical connection,Faulty Air Conditioning Amplifier


B1423 Description


This Diagnostic Trouble Code (DTC) is output when the refrigerant pressure is either extremely low (0.19 MPa [2.0 kgf/cm2, 28 psi] or less) or extremely high (3.14 MPa [32.0 kgf/cm2, 455 psi] or more). The air conditioning pressure sensor, which is installed on the pipe of the high-pressure side, detects the refrigerant pressure and sends refrigerant pressure signals to the air conditioning amplifier. The air conditioning amplifier determines the pressure from the signals in accordance with the sensor characteristics and controls the compressor accordingly.