DTC B1423: Open in Pressure Sensor Circuit / Abnormal Refrigerant Pressure [06/2018 - ]: Description

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This DTC is stored if refrigerant pressure on the high pressure side is extremely low (176 kPaG (1.8 kgf/cm² , 26 psi) or less) or extremely high (3025 kPaG (30.8 kgf/cm² , 439 psi) or more). The air conditioner pressure sensor, which is installed to 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	Open in Pressure Sensor Circuit / Abnormal Refrigerant Pressure	Open or short in air conditioner pressure sensor circuit Refrigerant pressure on high pressure side is extremely low (176 kPaG (1.8 kgf/cm² , 26 psi) or less) or extremely high (3025 kPaG (30.8 kgf/cm² , 439 psi) or more)	Air conditioner pressure sensor Harness or connector 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) Refrigerant volume (excessive, low)	-