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Engine-Codes – Generic – P2C16

P2C16 Code - Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit

Quick Answer

The P2C16 code indicates a problem with the Exhaust Camshaft Profile Actuator Position Sensor 2 circuit, which is crucial for the proper functioning of the variable valve timing (VVT) system in an engine. Common causes include Faulty Exhaust Camshaft Profile Actuator, Exhaust Camshaft Profile Actuator harness is open or shorted, Exhaust Camshaft Profile Actuator circuit has poor electrical connections. 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 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, Exhaust Camshaft Profile Actuator circuit has poor electrical connections.
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 Description

The P2C16 code indicates a problem with the Exhaust Camshaft Profile Actuator Position Sensor 2 circuit, which is crucial for the proper functioning of the variable valve timing (VVT) system in an engine. This sensor provides real-time feedback to the Engine Control Module (ECM) regarding the position of the actuator pins that adjust the exhaust camshaft profile sleeve. The Hall-effect sensor detects changes in a magnetic field, allowing it to accurately report the position of the actuator. This information is vital for the ECM to determine whether the exhaust camshaft has successfully transitioned between its various cam profiles, which can optimize engine performance, fuel efficiency, and emissions control.
OBDII Code P2C16 - Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit
P2C16 Code - Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit

Common Causes of P2C16

  1. Faulty Exhaust Camshaft Profile Actuator
  2. Exhaust Camshaft Profile Actuator harness is open or shorted
  3. Exhaust Camshaft Profile Actuator circuit has poor electrical connections
  4. Faulty Engine Control Module (ECM)
  5. Mechanical issues such as sticking actuator pins or debris in the actuator

Symptoms of P2C16

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Reduced engine power or performance
  3. Rough idling or stalling during operation
  4. Increased fuel consumption
  5. Unusual engine noises, such as knocking or pinging

How to Fix P2C16

  1. Perform a visual inspection of the Exhaust Camshaft Profile Actuator and its wiring harness for any visible damage or disconnections.
  2. Test the Exhaust Camshaft Profile Actuator Position Sensor using a multimeter to check for proper voltage and resistance readings.
  3. Inspect the ECM for any fault codes and ensure it is functioning correctly.
  4. Replace any damaged wiring or connectors associated with the actuator circuit.
  5. If necessary, replace the Exhaust Camshaft Profile Actuator or the Position Sensor to restore proper function.

Cost to Fix P2C16

The cost to diagnose and repair a P2C16 code can vary significantly based on the specific vehicle make and model, as well as labor rates in your area. Typically, parts such as the Exhaust Camshaft Profile Actuator or Position Sensor may range from $100 to $300, while labor costs can vary from $80 to $150 per hour, with dealerships often charging more than independent shops. Overall, you might expect a total repair cost between $200 and $600, depending on the complexity of the issue and the parts required.

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Code P2C16 Information for Specific Makes

  • P2C16 Chevrolet — Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit
  • P2C16 GMC — Exhaust Camshaft Profile Actuator Position Sensor 2 Circuit
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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