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Engine-Codes – Generic – P30B1

P30B1 Code - Intake Camshaft Profile Actuator Position Sensor 4 Performance

Quick Answer

The P30B1 code indicates a performance issue with the Intake Camshaft Profile Actuator Position Sensor 4, which plays a crucial role in regulating the camshaft's position to optimize engine performance. Common causes include Faulty Intake Camshaft Profile Actuator, Intake Camshaft Profile Actuator harness is open or shorted, Poor electrical connection in the Intake 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
P30B1 indicates Intake Camshaft Profile Actuator Position Sensor 4 Performance.
Common causes
Common causes include Faulty Intake Camshaft Profile Actuator, Intake Camshaft Profile Actuator harness is open or shorted, Poor electrical connection in the Intake 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 29, 2026
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Code P30B1 Description

The P30B1 code indicates a performance issue with the Intake Camshaft Profile Actuator Position Sensor 4, which plays a crucial role in regulating the camshaft's position to optimize engine performance. This sensor is part of the intake camshaft profile actuator assembly and utilizes Hall-effect technology to monitor the position of the actuator pins. These pins control the camshaft profile sleeve, allowing the engine to switch between different profiles such as high-lift, low-lift, and cylinder deactivation modes. This adaptability is essential for enhancing engine efficiency, improving fuel economy, and reducing emissions under various driving conditions.
OBDII Code P30B1 - Intake Camshaft Profile Actuator Position Sensor 4 Performance
P30B1 Code - Intake Camshaft Profile Actuator Position Sensor 4 Performance

Common Causes of P30B1

  1. Faulty Intake Camshaft Profile Actuator
  2. Intake Camshaft Profile Actuator harness is open or shorted
  3. Poor electrical connection in the Intake Camshaft Profile Actuator circuit
  4. Faulty Engine Control Module (ECM)
  5. Contamination or mechanical wear affecting the actuator pin movement

Symptoms of P30B1

  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 P30B1

  1. Perform a thorough visual inspection of the Intake Camshaft Profile Actuator and its wiring for any signs of damage or wear.
  2. Test the Intake Camshaft Profile Actuator Position Sensor using a multimeter to check for proper voltage and resistance readings.
  3. Inspect and repair any faulty wiring or poor electrical connections in the actuator circuit.
  4. If the actuator or sensor is found to be defective, replace the faulty component with a new part.
  5. Clear the diagnostic trouble codes from the ECM and conduct a test drive to ensure the issue has been resolved.

Cost to Fix P30B1

The cost to diagnose and repair the P30B1 code typically ranges from $200 to $600, depending on the specific repairs needed. This estimate includes parts and labor, with parts for the Intake Camshaft Profile Actuator or sensor generally costing between $100 to $300. Labor rates can vary significantly, with most shops charging between $80 to $150 per hour. Dealerships may charge higher rates, while independent shops may offer more competitive pricing. The total cost will also depend on the make and model of the vehicle, as well as the complexity of the repair.

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Code P30B1 Information for Specific Makes

  • P30B1 Chevrolet — Intake Camshaft Profile Actuator Position Sensor 4 Performance
  • P30B1 GMC — Intake Camshaft Profile Actuator Position Sensor 4 Performance
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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