MechanicDB
Fault Family System: Powertrain (P-Codes) 86 SAE Codes

Drive Motor Phase Current Circuit

Diagnostic & Technical Explanation
Code P0A51 sets when the drive motor inverter's phase-current sensors report one of the three motor phases missing, out of balance with the other two, or exceeding the commanded value for the present torque request. Because the drive motor carries the highest current of any motor in the system, the most common physical causes are a corroded or loose high-current phase-lead connection at the inverter's output terminals, a damaged Hall-effect or shunt phase-current sensor, and a shorted or open turn within the motor's stator winding itself. A single-phase imbalance under load, rather than a total loss of all three phases, points toward a winding or connection fault on that one phase specifically.

These 86 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 86 times.

Codes in this family (86)

CodeDefinitionRepair coverage
P0A51Drive Motor A Current Sensor Circuit3 ranked fixes
P0A52Drive Motor A Current Sensor Circuit Range/Performance3 ranked fixes
P0A53Drive Motor A Current Sensor Circuit Low3 ranked fixes
P0A54Drive Motor A Current Sensor Circuit High3 ranked fixes
P0A55Drive Motor B Current Sensor Circuit3 ranked fixes
P0A56Drive Motor B Current Sensor Circuit Range/Performance3 ranked fixes
P0A57Drive Motor B Current Sensor Circuit Low3 ranked fixes
P0A58Drive Motor B Current Sensor Circuit High3 ranked fixes
P0A5DDrive Motor A Phase U Current3 ranked fixes
P0A5EDrive Motor A Phase U Current Low3 ranked fixes
P0A5FDrive Motor A Phase U Current High3 ranked fixes
P0A60Drive Motor A Phase V Current3 ranked fixes
P0A61Drive Motor A Phase V Current Low3 ranked fixes
P0A62Drive Motor A Phase V Current High3 ranked fixes
P0A63Drive Motor A Phase W Current3 ranked fixes
P0A64Drive Motor A Phase W Current Low3 ranked fixes
P0A65Drive Motor A Phase W Current High3 ranked fixes
P0A66Drive Motor B Phase U Current3 ranked fixes
P0A67Drive Motor B Phase U Current Low3 ranked fixes
P0A68Drive Motor B Phase U Current High3 ranked fixes
P0A69Drive Motor B Phase V Current3 ranked fixes
P0A6ADrive Motor B Phase V Current Low3 ranked fixes
P0A6BDrive Motor B Phase V Current High3 ranked fixes
P0A6CDrive Motor B Phase W Current3 ranked fixes
P0A6DDrive Motor B Phase W Current Low3 ranked fixes
P0A6EDrive Motor B Phase W Current High3 ranked fixes
P0BE5Drive Motor A Phase U Current Sensor Circuit3 ranked fixes
P0BE6Drive Motor A Phase U Current Sensor Circuit Range/Performance3 ranked fixes
P0BE7Drive Motor A Phase U Current Sensor Circuit Low3 ranked fixes
P0BE8Drive Motor A Phase U Current Sensor Circuit High3 ranked fixes
P0BE9Drive Motor A Phase V Current Sensor Circuit3 ranked fixes
P0BEADrive Motor A Phase V Current Sensor Circuit Range/Performance3 ranked fixes
P0BEBDrive Motor A Phase V Current Sensor Circuit Low3 ranked fixes
P0BECDrive Motor A Phase V Current Sensor Circuit High3 ranked fixes
P0BEDDrive Motor A Phase W Current Sensor Circuit3 ranked fixes
P0BEEDrive Motor A Phase W Current Sensor Circuit Range/Performance3 ranked fixes
P0BEFDrive Motor A Phase W Current Sensor Circuit Low3 ranked fixes
P0BF0Drive Motor A Phase W Current Sensor Circuit High3 ranked fixes
P0BF1Drive Motor B Phase U Current Sensor Circuit3 ranked fixes
P0BF2Drive Motor B Phase U Current Sensor Circuit Range/Performance3 ranked fixes
P0BF3Drive Motor B Phase U Current Sensor Circuit Low3 ranked fixes
P0BF4Drive Motor B Phase U Current Sensor Circuit High3 ranked fixes
P0BF5Drive Motor B Phase V Current Sensor Circuit3 ranked fixes
P0BF6Drive Motor B Phase V Current Sensor Circuit Range/Performance3 ranked fixes
P0BF7Drive Motor B Phase V Current Sensor Circuit Low3 ranked fixes
P0BF8Drive Motor B Phase V Current Sensor Circuit High3 ranked fixes
P0BF9Drive Motor B Phase W Current Sensor Circuit3 ranked fixes
P0BFADrive Motor B Phase W Current Sensor Circuit Range/Performance3 ranked fixes
P0BFBDrive Motor B Phase W Current Sensor Circuit Low3 ranked fixes
P0BFCDrive Motor B Phase W Current Sensor Circuit High3 ranked fixes
P0BFDDrive Motor A Phase U-V-W Current Sensor Correlation3 ranked fixes
P0BFEDrive Motor B Phase U-V-W Current Sensor Correlation3 ranked fixes
P0BFFDrive Motor A Current3 ranked fixes
P0C00Drive Motor A Current Low3 ranked fixes
P0C01Drive Motor A Current High3 ranked fixes
P0C02Drive Motor B Current3 ranked fixes
P0C03Drive Motor B Current Low3 ranked fixes
P0C04Drive Motor B Current High3 ranked fixes
P0C05Drive Motor A Phase U-V-W Circuit/Open3 ranked fixes
P0C06Drive Motor A Phase U-V-W Circuit Low3 ranked fixes
P0C07Drive Motor A Phase U-V-W Circuit High3 ranked fixes
P0C08Drive Motor B Phase U-V-W Circuit/Open3 ranked fixes
P0C09Drive Motor B Phase U-V-W Circuit Low3 ranked fixes
P0C0ADrive Motor B Phase U-V-W Circuit High3 ranked fixes
P2C69Drive Motor 'A' Phase X Current3 ranked fixes
P2C6ADrive Motor 'A' Phase X Current Low3 ranked fixes
P2C6BDrive Motor 'A' Phase X Current High3 ranked fixes
P2C6CDrive Motor 'A' Phase Y Current3 ranked fixes
P2C6DDrive Motor 'A' Phase Y Current Low3 ranked fixes
P2C6EDrive Motor 'A' Phase Y Current High3 ranked fixes
P2C6FDrive Motor 'A' Phase Z Current3 ranked fixes
P2C70Drive Motor 'A' Phase Z Current Low3 ranked fixes
P2C71Drive Motor 'A' Phase Z Current High3 ranked fixes
P2E1BDrive Motor A Phase X Current Sensor Circuit3 ranked fixes
P2E1CDrive Motor A Phase X Current Sensor Circuit Range/Performance3 ranked fixes
P2E1DDrive Motor A Phase X Current Sensor Circuit Low3 ranked fixes
P2E1EDrive Motor A Phase X Current Sensor Circuit High3 ranked fixes
P2E1FDrive Motor A Phase Y Current Sensor Circuit3 ranked fixes
P2E20Drive Motor A Phase Y Current Sensor Circuit Range/Performance3 ranked fixes
P2E21Drive Motor A Phase Y Current Sensor Circuit Low3 ranked fixes
P2E22Drive Motor A Phase Y Current Sensor Circuit High3 ranked fixes
P2E23Drive Motor A Phase Z Current Sensor Circuit3 ranked fixes
P2E24Drive Motor A Phase Z Current Sensor Circuit Range/Performance3 ranked fixes
P2E25Drive Motor A Phase Z Current Sensor Circuit Low3 ranked fixes
P2E26Drive Motor A Phase Z Current Sensor Circuit High3 ranked fixes
P2E27Drive Motor A Phase X-Y-Z Current Sensor Correlation3 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: