P0C4F Possible Causes
- Faulty hybrid vehicle motor
- Hybrid vehicle motor wiring harness open or short-circuited
- Poor electrical connection in hybrid vehicle motor circuit
- Faulty HV control ECU
What Does It Mean?
How to Fix P0C4F Code
Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
P0C4F Possible Symptoms
Engine light on (or service engine soon warning light)
P0C4F Meaning
The motor resolver is a type of sensor that detects magnetic pole positions, essential for ensuring highly efficient control of MG1 and MG2.
The resolver stator contains an excitation coil and two detection coils. Because the rotor has an oval shape, the gap between the stator and rotor changes as the rotor rotates. An alternating current with a predetermined frequency flows through the excitation coil, and the S and C detection coils generate alternating currents according to the sensor rotor position.
The HV control ECU detects the absolute rotor position based on the phases of the S and C detection coils and their waveform height. Additionally, the CPU calculates the amount of position change within a predetermined time period to use the resolver as a speed sensor.