DTC B1423: Pressure Sensor Circuit [12/2013 - 11/2016]: Description

This DTC is stored if refrigerant pressure on the high pressure side is extremely low (176 kPa (1.8 kgf/cm² , 26 psi) or less) or extremely high (3025 kPa (30.8 kgf/cm² , 439 psi) or more). The air conditioner tube and accessory assembly, which is installed on the high pressure side pipe to detect refrigerant pressure, sends a refrigerant pressure signal to the air conditioning amplifier assembly. The air conditioning amplifier assembly converts this signal to a pressure value according to the sensor characteristics and uses it to control the compressor.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Memory
B1423	Pressure Sensor Circuit	Open or short in air conditioner tube and accessory assembly circuit Refrigerant pressure on high pressure side is extremely low (176 kPa (1.8 kgf/cm² , 26 psi) or less) or extremely high (3025 kPa (30.8 kgf/cm² , 439 psi) or more)	Air conditioner tube and accessory assembly Harness or connector between air conditioner tube and accessory assembly and air conditioning amplifier assembly Air conditioning amplifier assembly Cooler expansion valve (blocked, stuck) Cooler condenser assembly (blocked, deterioration of cooling capacity due to dirt) Cooler dryer (moisture in the refrigerant cycle cannot be absorbed) Cooling fan system (cooler condenser assembly cannot be cooled down) Air conditioning system (leaks, blocked)	-