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Engine-Codes – GMC – P2C15 2023 GMC Sierra

P2C15 2023 GMC Sierra Code - Exhaust Camshaft Profile Actuator Position Sensor 1 Circuit High Voltage

Quick Answer

The P2C15 code indicates a high voltage condition in the Exhaust Camshaft Profile Actuator Position Sensor 1 circuit. Common causes include Faulty Exhaust Camshaft Profile Actuator, Exhaust Camshaft Profile Actuator harness is open or shorted, Poor electrical connection in the Exhaust 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
P2C15 2023 GMC Sierra indicates Exhaust Camshaft Profile Actuator Position Sensor 1 Circuit High Voltage.
Common causes
Common causes include Faulty Exhaust Camshaft Profile Actuator, Exhaust Camshaft Profile Actuator harness is open or shorted, Poor electrical connection in the Exhaust 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 31, 2026
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Code P2C15 2023 GMC Sierra Description

The P2C15 code indicates a high voltage condition in the Exhaust Camshaft Profile Actuator Position Sensor 1 circuit. This sensor plays a critical role in the variable valve timing (VVT) system of the engine, specifically in controlling the exhaust camshaft profile. By providing real-time feedback to the Engine Control Module (ECM) about the position of the actuator pins, the sensor enables the ECM to adjust the camshaft profile according to driving conditions. This adjustment allows for improved engine efficiency, better fuel economy, reduced emissions, and enhanced overall performance. If the ECM detects that the voltage signal from the sensor is higher than expected, it triggers the P2C15 code, indicating a potential malfunction.
OBDII Code P2C15 2023 GMC Sierra - Exhaust Camshaft Profile Actuator Position Sensor 1 Circuit High Voltage
P2C15 2023 GMC Sierra Code - Exhaust Camshaft Profile Actuator Position Sensor 1 Circuit High Voltage

Common Causes of P2C15 2023 GMC Sierra

  1. Faulty Exhaust Camshaft Profile Actuator
  2. Exhaust Camshaft Profile Actuator harness is open or shorted
  3. Poor electrical connection in the Exhaust Camshaft Profile Actuator circuit
  4. Faulty Engine Control Module (ECM)
  5. Damaged wiring or connectors related to the actuator or sensor

Symptoms of P2C15 2023 GMC Sierra

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

How to Fix P2C15 2023 GMC Sierra

  1. Perform a visual inspection of the wiring and connectors associated with the Exhaust Camshaft Profile Actuator and sensor for any signs of damage or corrosion.
  2. Test the Exhaust Camshaft Profile Actuator Position Sensor using a multimeter to check for proper voltage and resistance readings.
  3. If the sensor is faulty, replace it with a new one and ensure all connections are secure.
  4. Inspect the Exhaust Camshaft Profile Actuator for mechanical issues, such as sticking pins or debris, and address any problems found.
  5. Clear the fault codes from the ECM and conduct a road test to verify that the issue has been resolved and that the engine operates normally.

Cost to Fix P2C15 2023 GMC Sierra

The cost to diagnose and repair the P2C15 code can vary widely depending on the specific issue and the vehicle make and model. Typical parts, such as the Exhaust Camshaft Profile Actuator Position Sensor, can range from $50 to $200, while labor costs may range from $80 to $150 per hour, depending on the shop's location and expertise. Overall, the total repair cost may fall between $150 and $600, with dealerships generally charging higher rates than independent shops.

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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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