MechanicDB
Fault Family System: Powertrain (P-Codes) 57 SAE Codes

HV Battery Cell Balancing

Diagnostic & Technical Explanation
Code P0DAB sets when the battery management system commands a cell-group balancing resistor on or off and the resulting cell-group voltage trend, current draw, or FET-driver feedback does not match the commanded state within the expected time. The most common physical causes are a failed or shorted balancing FET on the BMS board, a corroded sense/balance-lead connector at the cell-group tap, and an internally imbalanced or aged cell group that cannot be brought back into range.

These 57 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 57 times.

Codes in this family (57)

CodeDefinitionRepair coverage
P0DABHybrid/EV Battery Cell Balancing Performance3 ranked fixes
P0DACHybrid/EV Battery Cell Balancing Circuit A3 ranked fixes
P0DADHybrid/EV Battery Cell Balancing Circuit A Stuck On3 ranked fixes
P0DAEHybrid/EV Battery Cell Balancing Circuit A Stuck Off3 ranked fixes
P0DAFHybrid/EV Battery Cell Balancing Circuit A Range/Performance3 ranked fixes
P0DB0Hybrid/EV Battery Cell Balancing Circuit B3 ranked fixes
P0DB1Hybrid/EV Battery Cell Balancing Circuit B Stuck On3 ranked fixes
P0DB2Hybrid/EV Battery Cell Balancing Circuit B Stuck Off3 ranked fixes
P0DB3Hybrid/EV Battery Cell Balancing Circuit B Range/Performance3 ranked fixes
P0DB4Hybrid/EV Battery Cell Balancing Circuit C3 ranked fixes
P0DB5Hybrid/EV Battery Cell Balancing Circuit C Stuck On3 ranked fixes
P0DB6Hybrid/EV Battery Cell Balancing Circuit C Stuck Off3 ranked fixes
P0DB7Hybrid/EV Battery Cell Balancing Circuit C Range/Performance3 ranked fixes
P0DB8Hybrid/EV Battery Cell Balancing Circuit D3 ranked fixes
P0DB9Hybrid/EV Battery Cell Balancing Circuit D Stuck On3 ranked fixes
P0DBAHybrid/EV Battery Cell Balancing Circuit D Stuck Off3 ranked fixes
P0DBBHybrid/EV Battery Cell Balancing Circuit D Range/Performance3 ranked fixes
P0DBCHybrid/EV Battery Cell Balancing Circuit E3 ranked fixes
P0DBDHybrid/EV Battery Cell Balancing Circuit E Stuck On3 ranked fixes
P0DBEHybrid/EV Battery Cell Balancing Circuit E Stuck Off3 ranked fixes
P0DBFHybrid/EV Battery Cell Balancing Circuit E Range/Performance3 ranked fixes
P0DC0Hybrid/EV Battery Cell Balancing Circuit F3 ranked fixes
P0DC1Hybrid/EV Battery Cell Balancing Circuit F Stuck On3 ranked fixes
P0DC2Hybrid/EV Battery Cell Balancing Circuit F Stuck Off3 ranked fixes
P0DC3Hybrid/EV Battery Cell Balancing Circuit F Range/Performance3 ranked fixes
P0DC4Hybrid/EV Battery Cell Balancing Circuit G3 ranked fixes
P0DC5Hybrid/EV Battery Cell Balancing Circuit G Stuck On3 ranked fixes
P0DC6Hybrid/EV Battery Cell Balancing Circuit G Stuck Off3 ranked fixes
P0DC7Hybrid/EV Battery Cell Balancing Circuit G Range/Performance3 ranked fixes
P0DC8Hybrid/EV Battery Cell Balancing Circuit H3 ranked fixes
P0DC9Hybrid/EV Battery Cell Balancing Circuit H Stuck On3 ranked fixes
P0DCAHybrid/EV Battery Cell Balancing Circuit H Stuck Off3 ranked fixes
P0DCBHybrid/EV Battery Cell Balancing Circuit H Range/Performance3 ranked fixes
P0DCCHybrid/EV Battery Cell Balancing Circuit I3 ranked fixes
P0DCDHybrid/EV Battery Cell Balancing Circuit I Stuck On3 ranked fixes
P0DCEHybrid/EV Battery Cell Balancing Circuit I Stuck Off3 ranked fixes
P0DCFHybrid/EV Battery Cell Balancing Circuit I Range/Performance3 ranked fixes
P0DD0Hybrid/EV Battery Cell Balancing Circuit J3 ranked fixes
P0DD1Hybrid/EV Battery Cell Balancing Circuit J Stuck On3 ranked fixes
P0DD2Hybrid/EV Battery Cell Balancing Circuit J Stuck Off3 ranked fixes
P0DD3Hybrid/EV Battery Cell Balancing Circuit J Range/Performance3 ranked fixes
P0DD4Hybrid/EV Battery Cell Balancing Circuit K3 ranked fixes
P0DD5Hybrid/EV Battery Cell Balancing Circuit K Stuck On3 ranked fixes
P0DD6Hybrid/EV Battery Cell Balancing Circuit K Stuck Off3 ranked fixes
P0DD7Hybrid/EV Battery Cell Balancing Circuit K Range/Performance3 ranked fixes
P0DD8Hybrid/EV Battery Cell Balancing Circuit L3 ranked fixes
P0DD9Hybrid/EV Battery Cell Balancing Circuit L Stuck On3 ranked fixes
P0DDAHybrid/EV Battery Cell Balancing Circuit L Stuck Off3 ranked fixes
P0DDBHybrid/EV Battery Cell Balancing Circuit L Range/Performance3 ranked fixes
P0DDCHybrid/EV Battery Cell Balancing Circuit M3 ranked fixes
P0DDDHybrid/EV Battery Cell Balancing Circuit M Stuck On3 ranked fixes
P0DDEHybrid/EV Battery Cell Balancing Circuit M Stuck Off3 ranked fixes
P0DDFHybrid/EV Battery Cell Balancing Circuit M Range/Performance3 ranked fixes
P0DE0Hybrid/EV Battery Cell Balancing Circuit N3 ranked fixes
P0DE1Hybrid/EV Battery Cell Balancing Circuit N Stuck On3 ranked fixes
P0DE2Hybrid/EV Battery Cell Balancing Circuit N Stuck Off3 ranked fixes
P0DE3Hybrid/EV Battery Cell Balancing Circuit N Range/Performance3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here: