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Home >> Lexus >> 2024 >> RX 500h >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Hybrid Control System - Diagnostic Codes (5 Of 7)) >> HYBRID CONTROL SYSTEM (for PHEV Model) >> DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open [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 

    Current interrupt devices (CIDs), which mechanically shut off the high-voltage circuit, are installed in each HV battery cell to protect the HV battery from overcharge (overvoltage).

    The cause of this malfunction may be one of the following:

    • Battery ECU assembly malfunction
    • Hybrid battery stack malfunction
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