Drive Motor Phase U Current Low
The P0A67 code indicates that the hybrid drive motor's Phase U current is lower than expected. This typically points to a fault in the motor winding, wiring, or the inverter module. The drive motor uses three phases (U, V, W) to generate torque; a low current in one phase can cause reduced power, rough operation, or failure to move. Common causes include a shorted or open motor winding, damaged wiring/connectors, or a malfunctioning inverter.
01. Most Common Causes
- Faulty drive motor winding (open or shorted)
- Damaged wiring or connectors in Phase U circuit
- Malfunctioning inverter module
02. Symptoms You Will Notice
- Reduced power or acceleration
- Check Engine Light illuminated
- Vehicle may not move or jerks during operation
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify the code and check for related codes (e.g., P0A68, P0A69).
Step 2: Visually inspect the drive motor wiring and connectors for damage, corrosion, or loose connections.
Step 3: Measure resistance and continuity of Phase U winding at the motor connector (compare to specifications).
Step 4: Test the inverter output to the motor using a multimeter or oscilloscope.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, it is not safe. Low current in a motor phase can cause sudden loss of power or complete failure, leading to a potential accident. Have the vehicle towed to a repair shop.
How much does it cost to fix?▼
Diagnosis typically costs $50-$150. Repair costs vary widely: wiring repairs may be $100-$300, while replacing a drive motor or inverter can exceed $1,000.