DTC P31B4-00: Extreme Hybrid/EV Battery Charging Current [08/2023 - ]: Procedure
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.
- CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)
Pre-procedure1
- None.
Procedure1
- Check for DTCs.
Powertrain > HV Battery > Trouble Codes
Powertrain > Hybrid Control > Trouble Codes
Result
Result Proceed to "P31B4-00" only is output. A DTCs except "P31B4-00" of hybrid battery system are output. B DTCs except "P31B4-00" of hybrid control system are output. C Post-procedure1
- Turn the ignition switch off.
Result:
A
REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY. Refer to REMOVAL [10/2022 - ]
Result:
B
GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2023 - ]
Result:
C
GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to DIAGNOSTIC TROUBLE CODE CHART [08/2023 - 10/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ]
- None.