DTC P31B5-49: Hybrid/EV Battery Internal Electronic Failure [11/2021 - ]: Procedure

1. Check for DTCs.

   Powertrain > HV Battery > Trouble Codes 

   Powertrain > Hybrid Control > Trouble Codes 

   Result

   Result	Proceed to
   "P31B5-49" only is output.	A
   DTCs except "P31B5-49" of hybrid battery system are output.	B
   DTCs except "P31B5-49" of hybrid control system are output.	C

2. 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 - ]