DTC P0A7F-123: Hybrid Battery Pack Deterioration [08/2013 - ]: Description
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- The battery smart unit and the power management control ECU calculate the SOC (state of charge) of the HV battery through the accumulated amperage in the HV battery. The battery smart unit sends the condition of the HV battery to the power management control ECU. Then the power management control ECU calculates the SOC based on the information and controls HV battery charge and discharge according to the driving condition.
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HINT:
P0A7F-123 will not be set unless the vehicle is driven for approximately 10 minutes after clearing the DTC. (As 2 trip detection logic is used, check for DTCs including pending DTCs.)
DTC No. INF Code DTC Detection Condition Trouble Area P0A7F 123 - Internal resistance of the HV battery is higher than the standard (1 trip detection)
- Difference in the capacity between battery blocks is larger than the standard (2 trip detection)
- HV battery
- Battery smart unit