P0C09
Drive Motor B Phase U-V-W Circuit Low
P0C09 is an OBD-II diagnostic trouble code meaning: Drive Motor B Phase U-V-W Circuit Low. Common causes: open circuit or short circuit in the phase wire circuit, voltage inverter fault. Estimated repair cost: $56–167.
Symptoms
- Hybrid system power reduction
- Unstable operation of the electric motor
- Malfunction indicator lamp (MIL) comes on
- Possible vibrations during operation of the electric motor
- Switching to emergency operation
Causes
- Open circuit or short circuit in the phase wire circuit
- Voltage inverter fault
- Poor contact in motor circuit connectors
- Internal damage to motor B
- Problems with the hybrid system control unit
How to Fix
- Check the integrity of the wiring harness for phases U, V, W
- Check the resistance of the motor windings B
- Diagnose the operation of the voltage inverter
- Check connections and connectors in the circuit
- Scan the hybrid system control module for additional codes
Related codes
Error P0C09 by Vehicle Brand
FAQ
What does the P0C09 code mean?
P0C09 is an OBD-II diagnostic trouble code that indicates: Drive Motor B Phase U-V-W Circuit Low
What causes a P0C09 error code?
The most common causes of P0C09 include: Open circuit or short circuit in the phase wire circuit; Voltage inverter fault; Poor contact in motor circuit connectors; Internal damage to motor B.
How do I fix a P0C09 diagnostic trouble code?
To fix P0C09: Check the integrity of the wiring harness for phases U, V, W. Check the resistance of the motor windings B. Diagnose the operation of the voltage inverter. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0C09?
Limited driving only, diagnose soon
How much does it cost to fix P0C09?
The estimated repair cost for P0C09 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat