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Engine-Codes – GMC – P2C16 2019 GMC Sierra

P2C16 2019 GMC Sierra Code - Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit

Quick Answer

The P2C16 code indicates an issue with the Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit in GMC vehicles. 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
P2C16 2019 GMC Sierra indicates Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit.
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 P2C16 2019 GMC Sierra Description

The P2C16 code indicates an issue with the Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit in GMC vehicles. This sensor is a crucial component of the exhaust camshaft profile actuator assembly, which plays a significant role in optimizing engine performance. It provides real-time feedback to the Engine Control Module (ECM) regarding the position of the actuator pins that adjust the exhaust camshaft profile sleeve. This adjustment allows the engine to utilize variable valve lift strategies, enhancing efficiency, reducing emissions, and improving overall performance based on driving conditions.
OBDII Code P2C16 2019 GMC Sierra - Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit
P2C16 2019 GMC Sierra Code - Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit

Common Causes of P2C16 2019 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. Mechanical issues such as sticking actuator pins or debris in the actuator

Symptoms of P2C16 2019 GMC Sierra

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

How to Fix P2C16 2019 GMC Sierra

  1. Perform a thorough visual inspection of the Exhaust Camshaft Profile Actuator and its wiring harness for any signs of damage or wear.
  2. Test the Exhaust Camshaft Profile Actuator Position Sensor for proper operation using a multimeter to check for correct voltage and resistance.
  3. If the sensor is faulty, replace it with a new one, ensuring that all connections are secure and free from corrosion.
  4. Inspect the actuator assembly for any mechanical issues, such as sticking pins or debris, and clean or replace components as necessary.
  5. Clear the fault codes and perform a road test to confirm that the issue has been resolved and that the engine is operating correctly.

Cost to Fix P2C16 2019 GMC Sierra

The cost to diagnose and repair the P2C16 code can vary widely based on the specific issue and the vehicle's make and model. Typically, parts such as the Exhaust Camshaft Profile Actuator Position Sensor may range from $50 to $200, while labor costs can vary from $80 to $150 per hour, depending on the shop's location and reputation. In total, you might expect to spend between $150 and $600 for diagnosis and repair. Dealerships may charge higher rates, while independent shops may offer more competitive pricing. Always consult with a trusted technician for an accurate estimate tailored to your vehicle's needs.

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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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