DTC P31B4-00: Extreme Hybrid/EV Battery Charging Current [11/2021 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350h, 2024 Lexus NX 350h, 2023 Lexus NX 350h, and 2022 Lexus NX 350h. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DTC OUTPUT (HV BATTERY, HYBRID CONTROL)
- 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 - Turn the ignition switch off.
Result:
A
REPLACE HYBRID VEHICLE CONTROL ECU. Refer to REMOVAL [11/2021 - ]
Result:
B
GO TO DTC CHART (HYBRID BATTERY SYSTEM). Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2021 - ]
Result:
C
GO TO DTC CHART (HYBRID CONTROL SYSTEM). Refer to DIAGNOSTIC TROUBLE CODE CHART [11/2021 - 03/2024] , or refer to DIAGNOSTIC TROUBLE CODE CHART [03/2024 - ]
- Check for DTCs.