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Engine-Codes – Chevrolet – P30B3 Chevrolet

P30B3 Chevrolet Code - Intake Camshaft Profile Actuator Position Sensor 4 Circuit High Voltage

Quick Answer

The diagnostic code P30B3 indicates a high voltage condition in the Intake Camshaft Profile Actuator Position Sensor 4 circuit for Chevrolet vehicles. Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedIntake Camshaft Profile Actuator circuit poor electrical connectionFaulty Engine Control Module (ECM)Contaminated or damaged actuator pin preventing proper 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
P30B3 Chevrolet indicates Intake Camshaft Profile Actuator Position Sensor 4 Circuit High Voltage.
Common causes
Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedIntake Camshaft Profile Actuator circuit poor electrical connectionFaulty Engine Control Module (ECM)Contaminated or damaged actuator pin preventing proper 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 P30B3 Chevrolet Description

The diagnostic code P30B3 indicates a high voltage condition in the Intake Camshaft Profile Actuator Position Sensor 4 circuit for Chevrolet vehicles. This sensor is a critical component of the variable valve timing (VVT) system, which optimizes engine performance by adjusting the timing of the intake camshaft based on driving conditions. The sensor utilizes Hall-effect technology to monitor the position of the actuator pins that control the camshaft profile sleeve. By providing real-time feedback to the Engine Control Module (ECM), it enables the engine to switch between different camshaft profiles, such as high-lift for performance and low-lift for fuel efficiency.
OBDII Code P30B3 Chevrolet - Intake Camshaft Profile Actuator Position Sensor 4 Circuit High Voltage
P30B3 Chevrolet Code - Intake Camshaft Profile Actuator Position Sensor 4 Circuit High Voltage

Common Causes of P30B3 Chevrolet

  1. Faulty Intake Camshaft Profile Actuator
  2. Intake Camshaft Profile Actuator harness is open or shorted
  3. Intake Camshaft Profile Actuator circuit poor electrical connection
  4. Faulty Engine Control Module (ECM)
  5. Contaminated or damaged actuator pin preventing proper movement

Symptoms of P30B3 Chevrolet

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Reduced engine power or acceleration
  3. Poor fuel economy
  4. Rough idling or stalling
  5. Increased emissions during vehicle operation

How to Fix P30B3 Chevrolet

  1. Perform a visual inspection of the wiring harness and connectors for damage or corrosion.
  2. Test the Intake Camshaft Profile Actuator Position Sensor for proper voltage and resistance using a multimeter.
  3. Check the actuator for mechanical binding or wear that could affect its movement.
  4. If necessary, replace the faulty sensor or actuator assembly.
  5. Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue is resolved.

Cost to Fix P30B3 Chevrolet

The cost to diagnose and repair the P30B3 code can vary significantly depending on the specific issue and the vehicle model. Typical parts, such as the Intake Camshaft Profile Actuator or the sensor, can range from $100 to $300, while labor costs can be between $80 and $150 per hour. Dealerships may charge higher rates, while independent shops may offer more competitive pricing. Overall, you can expect a total repair cost ranging from $200 to $600, depending on the complexity of the repair and local labor rates.

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Information for Specific Chevrolet 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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