AutoCodesBuick – P0C5C Buick

P0C5C Buick Code - Drive Motor 1 Position Sensor Circuit 2 Low Voltage

Quick Answer

The drive motor position sensor is monitored by the motor control module. Common causes include Faulty Drive Motor 1 Position Sensor, Drive Motor 1 Position Sensor harness is open or shorted, Drive Motor 1 Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0C5C Buick indicates Drive Motor 1 Position Sensor Circuit 2 Low Voltage.
Common causes
Common causes include Faulty Drive Motor 1 Position Sensor, Drive Motor 1 Position Sensor harness is open or shorted, Drive Motor 1 Position Sensor circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 1,269
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 07, 2022
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Code P0C5C Buick Description

The drive motor position sensor is monitored by the motor control module. The motor control module monitors the angular position, speed, and direction of the drive motor rotor based upon the signals of the resolver-type position sensor. The position sensor contains a drive coil, two driven coils, and an irregular-shaped metallic rotor. The metallic rotor is mechanically attached to the shaft of the drive motor. At vehicle ON, the motor control module outputs a 7 V AC, 10 kHz excitation signal to the drive coil. The drive coil excitation signal creates a magnetic field surrounding the two driven coils and the irregular-shaped rotor. The motor control module then monitors the two driven coil circuits for return signals, often referred to as Sine and Cosine waveforms, abbreviated SIN and COS. The position of the irregular metallic rotor causes the magnetically induced return signals of the driven coils to vary in size and shape. A comparison of the two driven coil signals allows the motor control module to determine the exact position, speed, and direction of the drive motor rotor. The drive motor 1 position sensor is serviceable separately from the drive motor assembly. The Diagnostic Trouble Code (DTC) will be set when the circuit voltage is less than 0.5 V.
OBDII Code P0C5C Buick - Drive Motor 1 Position Sensor Circuit 2 Low Voltage - AutoCodes.com
P0C5C Buick Code - Drive Motor 1 Position Sensor Circuit 2 Low Voltage

What are the Possible Causes of the DTC P0C5C Buick?

  • Faulty Drive Motor 1 Position Sensor
  • Drive Motor 1 Position Sensor harness is open or shorted
  • Drive Motor 1 Position Sensor circuit poor electrical connection
  • Faulty Power Inverter Module

How to Fix the DTC P0C5C Buick?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0C5C Buick code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0C5C Buick Code

What does the OBDII code P0C5C mean for a Buick?

P0C5C indicates a problem with the Drive Motor 1 Position Sensor Circuit 2, specifically a low voltage issue detected by the vehicle’s control module.

What are common symptoms of code P0C5C in a Buick?

Symptoms may include reduced engine performance, warning lights such as the check engine light, and difficulty driving or accelerating.

What causes the P0C5C code to appear on a Buick?

Common causes include a faulty Drive Motor 1 Position Sensor, damaged wiring or connectors, or issues with the control module.

Can driving with code P0C5C damage my Buick?

Prolonged driving with this code may lead to further damage to the motor or associated systems, and it is recommended to address the issue promptly.

How can I diagnose the P0C5C code on my Buick?

Start by inspecting the wiring and connectors for damage or corrosion, then test the Drive Motor 1 Position Sensor for functionality using a multimeter.

Can I reset code P0C5C without fixing the problem?

Clearing the code without resolving the underlying issue may result in the code returning and continued performance issues.

How much does it cost to fix code P0C5C on a Buick?

Repair costs vary depending on the cause but may range from $100 to $500 for sensor replacement or wiring repairs.

Is code P0C5C specific to hybrid or electric Buicks?

Yes, this code is typically associated with hybrid or electric Buicks equipped with drive motors and position sensors.

What tools do I need to repair code P0C5C on a Buick?

You may need a diagnostic scanner, multimeter, and basic tools to inspect and replace faulty wiring or sensors.

Can a faulty Drive Motor 1 Position Sensor affect fuel efficiency?

Yes, a malfunctioning sensor can impact vehicle performance and efficiency, leading to higher energy or fuel consumption.

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