Drive Motor Phase V Current Low
The P0A6A code indicates that the current in phase V of the drive motor is lower than expected. This is typically caused by a fault in the motor winding, a poor connection in the high-voltage wiring, or a malfunctioning inverter. The hybrid/EV powertrain control module monitors the current in each phase to ensure proper motor operation. A low current reading can lead to reduced motor power, uneven torque, and potential damage to the inverter or motor if not addressed.
01. Most Common Causes
- Faulty drive motor phase V winding (open or short)
- Poor electrical connection at motor or inverter phase V terminal
- Malfunctioning inverter (power module or control circuit)
02. Symptoms You Will Notice
- Reduced electric motor power or acceleration
- Check Engine Light or hybrid system warning light on
- Possible jerking or vibration during acceleration
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to read all codes and freeze frame data. Clear codes and test drive to see if P0A6A returns.
Step 2: Visually inspect the high-voltage cables and connectors at the drive motor and inverter for damage, corrosion, or loose connections.
Step 3: Perform a motor winding resistance test using a multimeter on phase V compared to other phases. Check for open or short circuits.
Step 4: If wiring and motor are okay, test the inverter output by monitoring phase V current with a scope or scan tool while the motor is running.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. Driving with a low phase current can cause further damage to the inverter or motor and may result in sudden loss of power.
How much does it cost to fix?▼
The cost varies widely. Simple connector repairs may cost $50-$150, while replacing a motor or inverter can cost $1,000-$3,000 or more.