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Engine-Codes – Generic – P30B0

P30B0 Code - Intake Camshaft Profile Actuator Position Sensor 4 Circuit

Quick Answer

The P30B0 diagnostic trouble code indicates a malfunction in the Intake Camshaft Profile Actuator Position Sensor 4 circuit. 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
P30B0 indicates Intake Camshaft Profile Actuator Position Sensor 4 Circuit.
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 30, 2026
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Code P30B0 Description

The P30B0 diagnostic trouble code indicates a malfunction in the Intake Camshaft Profile Actuator Position Sensor 4 circuit. This sensor is a crucial component of the variable valve timing (VVT) system, which plays a significant role in optimizing engine performance, fuel efficiency, and emissions control. The sensor is integrated into the intake camshaft profile actuator assembly and employs Hall-effect technology to monitor the position of the actuator pins that adjust the camshaft profile sleeve. By providing real-time feedback to the Engine Control Module (ECM), the sensor enables the engine to switch between different camshaft profiles, such as high-lift and low-lift modes, depending on driving conditions.
OBDII Code P30B0 - Intake Camshaft Profile Actuator Position Sensor 4 Circuit
P30B0 Code - Intake Camshaft Profile Actuator Position Sensor 4 Circuit

Common Causes of P30B0

  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 P30B0

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Reduced engine power and acceleration
  3. Poor fuel economy
  4. Rough idling or stalling
  5. Difficulty starting the engine

How to Fix P30B0

  1. Perform a visual inspection of the Intake Camshaft Profile Actuator and its wiring for damage or disconnections.
  2. Test the Intake Camshaft Profile Actuator Position Sensor for proper voltage and signal output using a multimeter.
  3. Check for any fault codes in the ECM and clear them after repairs.
  4. If necessary, replace the faulty Intake Camshaft Profile Actuator or repair any damaged wiring.
  5. Reassemble components and perform a road test to ensure the issue is resolved and the engine operates smoothly.

Cost to Fix P30B0

The cost to diagnose and repair the P30B0 code typically ranges from $200 to $600, depending on the specific issue and the parts required. Labor costs can vary significantly based on location, make, and model, with most shops charging between $80 and $150 per hour. Dealerships may charge higher rates, while independent shops might offer more competitive pricing. Always consider getting multiple estimates to ensure you receive a fair price for the necessary repairs.

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Code P30B0 Information for Specific Makes

  • P30B0 Chevrolet — Intake Camshaft Profile Actuator Position Sensor 4 Circuit
  • P30B0 GMC — Intake Camshaft Profile Actuator Position Sensor 4 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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