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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 83 (Heating / Air Conditioning System - Diagnostic Codes (1 Of 3)) >> AIR CONDITIONING SYSTEM (for PHEV Model) >> DTC B1387-19: A/C Cooling Electric Expansion Valve Circuit Current Above Threshold [08/2023 - ] >> Monitor Description

Monitor Description

WARNING: This page is about a different car, the 2025 Lexus RX 450h+ and 2024 Lexus RX 450h+. However, it is still accessible from the selected car via links, so may be relevant.

When there is a short circuit during cooler expansion valve motor excitation output or a heat pump ECU assembly internal defect, the air conditioning amplifier assembly illuminates the MIL and stores this DTC.

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