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Engine-Codes – GMC – P2C0F 2021 GMC Sierra

P2C0F 2021 GMC Sierra Code - Intake Camshaft Profile Actuator Position Sensor 3 Circuit Low Voltage

Quick Answer

The P2C0F code indicates a low voltage condition detected in the Intake Camshaft Profile Actuator Position Sensor 3 circuit. Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedIntake Camshaft Profile Actuator circuit poor electrical connectionFaulty Engine Control Module (ECM)Contaminated or damaged actuator pin preventing movement. 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
P2C0F 2021 GMC Sierra indicates Intake Camshaft Profile Actuator Position Sensor 3 Circuit Low Voltage.
Common causes
Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedIntake Camshaft Profile Actuator circuit poor electrical connectionFaulty Engine Control Module (ECM)Contaminated or damaged actuator pin preventing movement.
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 30, 2026
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Code P2C0F 2021 GMC Sierra Description

The P2C0F code indicates a low voltage condition detected in the Intake Camshaft Profile Actuator Position Sensor 3 circuit. This sensor is a critical component of the variable valve timing (VVT) system, which optimizes engine performance by adjusting the timing of the camshaft. The sensor monitors the position of the actuator pins that control the camshaft profile sleeve, allowing the Engine Control Module (ECM) to switch between different camshaft profiles. These profiles can include high-lift and low-lift settings, as well as cylinder deactivation modes, which enhance fuel efficiency and reduce emissions under varying driving conditions.
OBDII Code P2C0F 2021 GMC Sierra - Intake Camshaft Profile Actuator Position Sensor 3 Circuit Low Voltage
P2C0F 2021 GMC Sierra Code - Intake Camshaft Profile Actuator Position Sensor 3 Circuit Low Voltage

Common Causes of P2C0F 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 poor electrical connection
  4. Faulty Engine Control Module (ECM)
  5. Contaminated or damaged actuator pin preventing movement

Symptoms of P2C0F 2021 GMC Sierra

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

How to Fix P2C0F 2021 GMC Sierra

  1. Perform a visual inspection of the wiring harness and connectors for signs of damage or corrosion.
  2. Test the Intake Camshaft Profile Actuator Position Sensor for proper voltage and signal output.
  3. Check the actuator assembly for mechanical issues, such as sticking or binding of the actuator pin.
  4. If necessary, replace the faulty sensor or actuator assembly and repair any damaged wiring.
  5. Clear the diagnostic trouble codes and perform a road test to ensure proper operation of the VVT system.

Cost to Fix P2C0F 2021 GMC Sierra

The cost to diagnose and repair a P2C0F code can vary widely depending on the specific issue and the vehicle make and model. Typically, parts such as the Intake Camshaft Profile Actuator or the position sensor may range from $100 to $300. Labor costs can vary, with most shops charging between $80 and $150 per hour. Total repair costs, including parts and labor, may range from $200 to $800. Dealerships may charge higher rates, while independent shops may offer more competitive pricing. Always consult with a trusted mechanic for a detailed estimate based on your specific situation.

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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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