A damaged or loose wire in the motor B phase V circuit, including chafed insulation or a backed-out terminal; A faulty current sensor inside the inverter or motor controller that misreports phase V current; A failed inverter or motor control module driver circuit for phase V; An internal motor fault such as a shorted or open phase V winding or a bad connection at the motor terminal; Corrosion or water intrusion at the motor or inverter connectors; A poor ground connection for the motor or inverter assembly; A software or calibration issue in the controller that sets the current threshold incorrectly

DTC codes / P0Axx · Hybrid propulsion / P0A6A

P0A6ADrive Motor B Phase V Current Low

Q: What does code P0A6A mean?

Drive Motor B Phase V Current Low. P0A6A means the hybrid or electric vehicle controller has detected that the current flowing through phase V of drive motor B is lower than the expected value for the operating conditions. The computer compares commanded torque against measured phase current and flags the circuit or motor when the V-phase current stays below the calibrated threshold.

P0A6A means the hybrid or electric vehicle controller has detected that the current flowing through phase V of drive motor B is lower than the expected value for the operating conditions. The computer compares commanded torque against measured phase current and flags the circuit or motor when the V-phase current stays below the calibrated threshold.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaHybrid propulsion

Symptoms you may notice

Illumination of the hybrid system or check engine light, often with no other symptoms
Reduced power or limp-home mode that limits vehicle speed
The vehicle may refuse to start or move in electric mode
Rough operation, shuddering, or hesitation under acceleration
A message on the dash indicating a hybrid system fault or service required
In some cases the engine may run continuously because electric assist is disabled

Common causes, most likely first

A damaged or loose wire in the motor B phase V circuit, including chafed insulation or a backed-out terminal
A faulty current sensor inside the inverter or motor controller that misreports phase V current
A failed inverter or motor control module driver circuit for phase V
An internal motor fault such as a shorted or open phase V winding or a bad connection at the motor terminal
Corrosion or water intrusion at the motor or inverter connectors
A poor ground connection for the motor or inverter assembly
A software or calibration issue in the controller that sets the current threshold incorrectly

How to diagnose and fix it

Scan all modules for stored and pending codes, then record freeze-frame data for P0A6A and any related codes
Inspect the motor B phase V wiring and connectors for damage, corrosion, looseness, or water intrusion
Measure resistance and continuity of the phase V circuit from the controller to the motor, comparing with the other phases
Check the motor phase V winding resistance and insulation with a meter, looking for an open or short
Verify the current sensor signal and controller driver output with an oscilloscope or manufacturer-specific diagnostic tool
Perform any available calibration or software update for the motor controller
If the circuit and motor test good, substitute a known-good controller or inverter to confirm the fault before replacement

What the phase V current code really means

A low current reading on one phase often comes from a poor connection or chafed wire rather than a failed motor, so inspect the harness before condemning expensive hardware.
The current sensor for phase V may be inside the inverter assembly and can fail independently of the motor, causing a false low-current report.
This code can set intermittently from vibration or heat-related connector issues, so a wiggle test and a road test with live data may be needed to reproduce it.
Do not assume the motor is bad just because the code names a phase; the controller compares all three phases and a single low reading can come from a shared ground or reference circuit.
After any repair, clear the codes and perform a full drive cycle because some controllers will not re-enable electric assist until the monitor runs and passes.

Can I keep driving with P0A6A?

Do not continue driving normally because a phase current fault can leave the vehicle without electric propulsion or cause a sudden loss of power. Move the vehicle to a safe location and have it inspected before driving further, especially at highway speeds.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.