What Does P0A6A Mean?
Drive Motor B Phase V current is reading below the expected minimum threshold. The hybrid control module detects abnormally low Phase V current in the secondary drive motor during operation, suggesting an open winding, disconnected cable, or failed-low current sensor on the Phase V leg of motor B.
Safety Warning
Single-phase loss causes severe vibration and motor damage. Do not drive — tow to service.
Common Causes
35%
Open circuit in Phase V stator winding of drive motor B
25%
Phase V current sensor failure reading low in motor B inverter
25%
Disconnected or high-resistance Phase V cable to motor B
15%
Motor B inverter Phase V IGBT stuck open
Diagnostic Steps
1
Step 1: Verify Phase V reads near zero in motor B live data while U and W show normal current.
2
Step 2: With HV de-energized, check Phase V winding continuity on motor B from terminal to neutral.
3
Step 3: Inspect Phase V cable and terminals for loose connections or damage.
4
Step 4: Test motor B inverter Phase V IGBT pair for opens.
5
Step 5: Replace faulty component and verify balanced three-phase operation.
Estimated Repair Cost
$500 - $3,500
Parts + labor, varies by vehicle and location
Drive Motor B Phase V current is reading below the expected minimum threshold. The hybrid control module detects abnormally low Phase V current in the secondary drive motor during operation, suggesting an open winding, disconnected cable, or failed-low current sensor on the Phase V leg of motor B.
The most common cause of P0A6A (Drive Motor "B" Phase V Current Low) is: Open circuit in Phase V stator winding of drive motor B
Typical repair costs for P0A6A range from $500 to $3,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Single-phase loss causes severe vibration and motor damage. Do not drive — tow to service.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0A6A to identify the root cause.
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Quick Info
Category
Powertrain
System
Hybrid Drive Motor System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
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