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Engine-Codes – GMC – P2C08 2020 GMC Sierra

P2C08 2020 GMC Sierra Code - Intake Camshaft Profile Actuator Position Sensor 1 Circuit High Voltage

Quick Answer

The P2C08 code indicates a problem with the Intake Camshaft Profile Actuator Position Sensor 1 Circuit, specifically that it is reporting high voltage to the Engine Control Module (ECM). Common causes include Faulty Intake Camshaft Profile Actuator, Intake Camshaft Profile Actuator harness is open or shorted, Poor electrical connection in the Intake Camshaft Profile Actuator circuit. 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
P2C08 2020 GMC Sierra indicates Intake Camshaft Profile Actuator Position Sensor 1 Circuit High Voltage.
Common causes
Common causes include Faulty Intake Camshaft Profile Actuator, Intake Camshaft Profile Actuator harness is open or shorted, Poor electrical connection in the Intake Camshaft Profile Actuator circuit.
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 P2C08 2020 GMC Sierra Description

The P2C08 code indicates a problem with the Intake Camshaft Profile Actuator Position Sensor 1 Circuit, specifically that it is reporting high voltage to the Engine Control Module (ECM). This sensor is a critical component of the variable valve timing (VVT) system, which allows the engine to optimize performance across different RPM ranges and driving conditions. By adjusting the camshaft profile, the engine can switch between different lift profiles, enhancing power delivery, fuel efficiency, and reducing emissions.
OBDII Code P2C08 2020 GMC Sierra - Intake Camshaft Profile Actuator Position Sensor 1 Circuit High Voltage
P2C08 2020 GMC Sierra Code - Intake Camshaft Profile Actuator Position Sensor 1 Circuit High Voltage

Common Causes of P2C08 2020 GMC Sierra

  1. Faulty Intake Camshaft Profile Actuator
  2. Intake Camshaft Profile Actuator harness is open or shorted
  3. Poor electrical connection in the Intake Camshaft Profile Actuator circuit
  4. Faulty Engine Control Module (ECM)
  5. Contamination or mechanical wear affecting the actuator pin movement

Symptoms of P2C08 2020 GMC Sierra

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Reduced engine power and acceleration
  3. Increased fuel consumption
  4. Rough idling or engine misfires
  5. Unusual engine noises during operation

How to Fix P2C08 2020 GMC Sierra

  1. Perform a visual inspection of the wiring and connectors associated with the Intake Camshaft Profile Actuator for any signs of damage or corrosion.
  2. Test the Intake Camshaft Profile Actuator and its position sensor to determine if they are functioning within specifications.
  3. If necessary, replace the faulty Intake Camshaft Profile Actuator or the position sensor.
  4. Repair or replace any damaged wiring or connectors to ensure proper electrical connection.
  5. Clear the diagnostic trouble codes and perform a road test to verify that the issue has been resolved and that the engine operates normally.

Cost to Fix P2C08 2020 GMC Sierra

The cost to diagnose and repair the P2C08 code can vary significantly based on the specific issue and the labor rates in your area. Typically, parts for the Intake Camshaft Profile Actuator or its sensor can range from $100 to $300, while labor costs may range from $80 to $150 per hour. Dealerships may charge higher rates, while independent shops might offer more competitive pricing. Overall, you can expect a total repair cost to range from $200 to $600, depending on the extent of the repairs needed and your vehicle's make and model.

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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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