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Engine-Codes – GMC – P2C0C 2021 GMC Sierra

P2C0C 2021 GMC Sierra Code - Intake Camshaft Profile Actuator Position Sensor 2 Circuit High Voltage

Quick Answer

The diagnostic trouble code P2C0C indicates a high voltage condition in the Intake Camshaft Profile Actuator Position Sensor 2 circuit. Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedIntake Camshaft Profile Actuator circuit has poor electrical connectionsFaulty Engine Control Module (ECM)Contaminated or damaged actuator pin or sleeve. 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
P2C0C 2021 GMC Sierra indicates Intake Camshaft Profile Actuator Position Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedIntake Camshaft Profile Actuator circuit has poor electrical connectionsFaulty Engine Control Module (ECM)Contaminated or damaged actuator pin or sleeve.
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.
What is this?
Table of contents Created and updated by William Orellana on May 29, 2026
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Code P2C0C 2021 GMC Sierra Description

The diagnostic trouble code P2C0C indicates a high voltage condition in the Intake Camshaft Profile Actuator Position Sensor 2 circuit. This sensor is a critical component of the variable camshaft timing system, which allows the engine control module (ECM) to adjust the timing of the intake valves based on various driving conditions. By monitoring the position of the actuator pins that control the camshaft profile sleeve, the sensor enables the ECM to optimize engine performance, fuel efficiency, and emissions. The Hall-effect technology employed by the sensor provides real-time feedback on whether the actuator is in a retracted, extending, or fully extended position.
OBDII Code P2C0C 2021 GMC Sierra - Intake Camshaft Profile Actuator Position Sensor 2 Circuit High Voltage
P2C0C 2021 GMC Sierra Code - Intake Camshaft Profile Actuator Position Sensor 2 Circuit High Voltage

Common Causes of P2C0C 2021 GMC Sierra

  1. Faulty Intake Camshaft Profile Actuator
  2. Intake Camshaft Profile Actuator harness is open or shorted
  3. Intake Camshaft Profile Actuator circuit has poor electrical connections
  4. Faulty Engine Control Module (ECM)
  5. Contaminated or damaged actuator pin or sleeve

Symptoms of P2C0C 2021 GMC Sierra

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Reduced engine power or performance
  3. Poor fuel economy
  4. Rough idling or stalling
  5. Increased emissions or failed emissions test

How to Fix P2C0C 2021 GMC Sierra

  1. Perform a visual inspection of the Intake Camshaft Profile Actuator and associated wiring for damage or wear.
  2. Test the Intake Camshaft Profile Actuator Position Sensor for proper voltage output using a multimeter.
  3. Check the electrical connections and wiring for continuity and shorts, repairing or replacing as necessary.
  4. If the actuator or sensor is found to be faulty, replace the defective component with a new part.
  5. Clear the diagnostic trouble codes and perform a test drive to ensure the issue is resolved and the engine operates normally.

Cost to Fix P2C0C 2021 GMC Sierra

The cost to diagnose and repair the P2C0C code typically ranges from $200 to $600, depending on the specific repairs needed. This estimate includes parts and labor, with parts such as the Intake Camshaft Profile Actuator or sensor costing between $100 and $300. Labor costs can vary significantly, with most shops charging between $80 and $150 per hour. Dealerships may charge higher rates, while independent shops may offer lower prices. The total cost will also depend on the vehicle make, model, and engine type, as well as the labor rates in your area.

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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.

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