P0C51 - Drive Motor 'A' Position Sensor Circuit 'A' Range/Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3    What is this?
Table of contents

P0C51 Possible Causes

  • Faulty Hybrid vehicle motor
  • Hybrid vehicle motor harness is open or shorted
  • Hybrid vehicle motor circuit poor electrical connection
  • Faulty HV control ECU

How do I fix code P0C51?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Cost of diagnosing the P0C51 code

Labor: 1.0

The cost of diagnosing the P0C51 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0C51 Description

The motor resolver is a type of sensor that detects the position of the magnetic poles, which are indispensable for ensuring the highly efficient control of the MG1 and MG2.
The stator of the resolver contains an excitation coil and two detection coils. Because the rotor has an oval shape, the gap between the stator and the rotor changes as the rotor turns. An alternating current with a predetermined frequency flows through the excitation coil, and detection coils S and C output alternating currents in accordance with the position of the sensor rotor.
The HV control ECU detects the absolute position of the rotor in accordance with the phases of detection coils S and C and the height of their waveform. Furthermore, the CPU calculates the amount of change in the position within a predetermined length of time, in order to use the resolver as a speed sensor.
OBDII Code P0c51 - Drive Motor 'A' Position Sensor Circuit 'A' Range/Performance - AutoCodes.com

More Information

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