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Engine-Codes – GMC – P2C05 2023 GMC Sierra

P2C05 2023 GMC Sierra Code - Intake Camshaft Profile Actuator Position Sensor 1 Circuit

Quick Answer

The P2C05 code indicates a problem with the Intake Camshaft Profile Actuator Position Sensor 1 Circuit in GMC vehicles. Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedPoor electrical connection in the Intake Camshaft Profile Actuator circuitFaulty Engine Control Module (ECM)Contamination or mechanical wear affecting the actuator pin 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
P2C05 2023 GMC Sierra indicates Intake Camshaft Profile Actuator Position Sensor 1 Circuit.
Common causes
Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedPoor electrical connection in the Intake Camshaft Profile Actuator circuitFaulty Engine Control Module (ECM)Contamination or mechanical wear affecting the actuator pin 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 29, 2026
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Code P2C05 2023 GMC Sierra Description

The P2C05 code indicates a problem with the Intake Camshaft Profile Actuator Position Sensor 1 Circuit in GMC vehicles. This sensor is a crucial component of the variable valve timing (VVT) system, which optimizes engine performance by adjusting the camshaft's position based on driving conditions. 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, such as high-lift for performance and low-lift for fuel efficiency. By doing so, it enhances engine responsiveness, improves fuel economy, and reduces emissions.
OBDII Code P2C05 2023 GMC Sierra - Intake Camshaft Profile Actuator Position Sensor 1 Circuit
P2C05 2023 GMC Sierra Code - Intake Camshaft Profile Actuator Position Sensor 1 Circuit

Common Causes of P2C05 2023 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 P2C05 2023 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 engine stalling
  5. Increased emissions during vehicle inspection

How to Fix P2C05 2023 GMC Sierra

  1. Perform a visual inspection of the Intake Camshaft Profile Actuator and its wiring for any signs of damage or wear.
  2. Test the Intake Camshaft Profile Actuator using a multimeter to check for proper voltage and resistance.
  3. Inspect and repair any damaged wiring or poor connections in the actuator circuit.
  4. If the actuator is faulty, replace it with a new or remanufactured unit.
  5. Clear the diagnostic trouble codes and perform a road test to ensure the issue is resolved and the engine operates normally.

Cost to Fix P2C05 2023 GMC Sierra

The cost to diagnose and repair the P2C05 code typically ranges from $150 to $600, depending on the specific issue and whether parts need to be replaced. Labor costs can vary significantly, with most shops charging between $80 and $150 per hour. Dealerships tend to be on the higher end of the scale, while independent shops may offer more competitive rates. Parts for the Intake Camshaft Profile Actuator can range from $100 to $300, depending on the make and model of the vehicle.

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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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