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P2C17 GMC Code - Exhaust Camshaft Profile Actuator Position Sensor 2 Performance

Quick Answer

The P2C17 code indicates a performance issue with the Exhaust Camshaft Profile Actuator Position Sensor 2, which is critical for the proper functioning of the variable valve timing (VVT) system. 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
P2C17 GMC indicates Exhaust Camshaft Profile Actuator Position Sensor 2 Performance.
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 P2C17 GMC Description

The P2C17 code indicates a performance issue with the Exhaust Camshaft Profile Actuator Position Sensor 2, which is critical for the proper functioning of the variable valve timing (VVT) system. This sensor is integral to the exhaust camshaft profile actuator assembly, providing real-time feedback to the Engine Control Module (ECM) about the position of the actuator pins. These pins are responsible for adjusting the exhaust camshaft profile sleeve, allowing the engine to optimize its performance based on varying operating conditions. The Hall-effect sensor detects changes in a magnetic field to accurately relay the position of the actuator pins to the ECM.
OBDII Code P2C17 GMC - Exhaust Camshaft Profile Actuator Position Sensor 2 Performance
P2C17 GMC Code - Exhaust Camshaft Profile Actuator Position Sensor 2 Performance

Common Causes of P2C17 GMC

  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 within the actuator assembly

Symptoms of P2C17 GMC

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

How to Fix P2C17 GMC

  1. Perform a 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 using a multimeter to check for proper voltage and resistance readings.
  3. If the sensor is faulty, replace the Exhaust Camshaft Profile Actuator Position Sensor with a new, OEM-quality component.
  4. Inspect and repair any damaged wiring or poor connections in the actuator circuit.
  5. Clear the fault codes from the ECM and conduct a road test to ensure the issue is resolved and the engine operates smoothly.

Cost to Fix P2C17 GMC

The cost to diagnose and repair a P2C17 code typically ranges from $150 to $500, depending on the specific issues identified and the necessary repairs. Parts such as the Exhaust Camshaft Profile Actuator Position Sensor can cost between $100 and $300, while labor costs may vary based on the shop's hourly rate, which generally falls between $80 and $150 per hour. Dealerships may charge higher rates, while independent shops might offer more competitive pricing. Always consider location, make/model, and engine type when estimating repair costs.

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Information for Specific GMC Models

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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