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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 59 (Hybrid Control System - Diagnostic Codes (4 Of 7)) >> HYBRID CONTROL SYSTEM (for PHEV Model) >> DTC P0C73-96: Motor Electronics Coolant Pump "A" Component Internal Failure [08/2023 - ] >> DTC Summary

DTC Summary

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.
  1. MALFUNCTION DESCRIPTION 

    This DTC is stored when the inverter water pump assembly is malfunctioning. The cause of this malfunction may be one of the following:

    Inverter water pump assembly malfunction 

    • Inverter water pump assembly internal malfunction
    • Open or short in wire harness
    • Improperly connected connector

    Hybrid cooling system malfunction 

    • Foreign matter in inverter water pump assembly
    • Hybrid cooling system coolant is frozen

    HINT: 

    If this DTC is stored, the driving torque may be restricted.