DTC P0534-7A: Refrigerant Gas Fluid Leak or Seal Failure [12/2023 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus TX 550h+. However, it is still accessible from the selected car via links, so may be relevant.

This DTC is stored if the amount of refrigerant in the air conditioning system is insufficient.

The air conditioning amplifier assembly receives the ambient temperature signal, refrigerant pressure signal, etc. from various sensors.

Based on these signals, the air conditioning amplifier assembly detects the amount of refrigerant.

The A/C switch indicator is turned off and the air conditioning system is stopped if the amount of refrigerant is insufficient.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory	DTC Output from	Priority	Note
P0534-7A	Refrigerant Gas Fluid Leak or Seal Failure	Diagnosis Condition: Normal operation refrigerant amount check conditions are met. The following condition is detected in the normal operation refrigerant shortage check Malfunction: Amount of refrigerant is judged to be insufficient by normal operation refrigerant amount check. Amount of refrigerant is insufficient Detection Time: Air conditioning system operating time: 15 minutes or more	Refrigerant volume Air conditioning pressure sensor Harness or connector Air conditioning amplifier assembly	Does not come on	Memorized	Air Conditioner	A	-

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

DTC Output from

Priority

Note

P0534-7A

Refrigerant Gas Fluid Leak or Seal Failure

Diagnosis Condition:

Normal operation refrigerant amount check conditions are met.
The following condition is detected in the normal operation refrigerant shortage check

Malfunction:

Amount of refrigerant is judged to be insufficient by normal operation refrigerant amount check.
Amount of refrigerant is insufficient

Detection Time:

Air conditioning system operating time: 15 minutes or more

Refrigerant volume
Air conditioning pressure sensor
Harness or connector
Air conditioning amplifier assembly

Does not come on

Memorized

Air Conditioner