P0C09Drive Motor B Phase U-V-W Circuit Low
The drive motor B phase U-V-W output reports a circuit low condition. The drive motor's position, current and temperature are watched continuously; a fault here downgrades the inverter to a safe operating point or triggers torque reduction.
This code also has a manufacturer-specific definition:
Can I keep driving? NO
STOP the vehicle in a safe place. Continuing to drive may cause serious engine damage or put your safety at risk.
Sistema Afectado
Sistema Híbrido / EV · Batería HV y motor eléctrico
Pertenece al sistema de alto voltaje: batería de tracción, inversor o motor eléctrico.
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Symptoms You Will Notice
What you may observe when this code appears
- EV/hybrid system warning light on Reduced motor power or torque Possible limp mode or vehicle shutdown
Possible Causes
The components or conditions that trigger this code
- 1Phase wire shorted to ground Low-side switch open in inverter Connector pins corroded - high contact resistance
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Difficulty: hard. Estimated time: 3-16 hours. Estimated cost: €800-€
- 2Professional repair recommended
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Varies by diagnosis
* Diagnosis only: $50–$150
Quick Info
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