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P30B1 2021 Chevrolet Silverado 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 in Chevrolet vehicles. Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedPoor electrical connection in the Intake Camshaft Profile Actuator circuitFaulty Engine Control Module (ECM)Contamination or mechanical wear affecting the actuator pin. 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 2021 Chevrolet Silverado indicates Intake Camshaft Profile Actuator Position Sensor 4 Performance.
Common causes
Common causes include Faulty Intake Camshaft Profile ActuatorIntake Camshaft Profile Actuator harness is open or shortedPoor electrical connection in the Intake Camshaft Profile Actuator circuitFaulty Engine Control Module (ECM)Contamination or mechanical wear affecting the actuator pin.
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 2021 Chevrolet Silverado Description

The P30B1 code indicates a performance issue with the Intake Camshaft Profile Actuator Position Sensor 4 in Chevrolet vehicles. This sensor is a crucial component of the variable valve timing (VVT) system, which optimizes engine performance by adjusting the timing of the intake valves based on various driving conditions. The actuator, controlled by the Engine Control Module (ECM), alters the camshaft profile to enhance power output, improve fuel efficiency, and reduce emissions. When the ECM detects that the position of the actuator does not align with the expected values, it triggers the P30B1 code.
OBDII Code P30B1 2021 Chevrolet Silverado - Intake Camshaft Profile Actuator Position Sensor 4 Performance
P30B1 2021 Chevrolet Silverado Code - Intake Camshaft Profile Actuator Position Sensor 4 Performance

Common Causes of P30B1 2021 Chevrolet Silverado

  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

Symptoms of P30B1 2021 Chevrolet Silverado

  1. Engine Light ON (or Service Engine Soon Warning Light)
  2. Reduced engine performance or power loss
  3. Decreased fuel efficiency
  4. Rough idling or engine stalling
  5. Unusual engine noises during operation

How to Fix P30B1 2021 Chevrolet Silverado

  1. Perform a visual inspection of the wiring and connectors associated with the Intake Camshaft Profile Actuator for any signs of damage or corrosion.
  2. Test the Intake Camshaft Profile Actuator and its position sensor using a multimeter to check for proper voltage and signal output.
  3. If the actuator or sensor is found to be faulty, replace the defective component with a new one.
  4. Clear the diagnostic trouble codes from the ECM and perform a test drive to ensure the issue is resolved.
  5. If the problem persists, further diagnose the ECM and related circuits for additional faults or issues.

Cost to Fix P30B1 2021 Chevrolet Silverado

The cost to diagnose and repair the P30B1 code can vary significantly based on the specific issue and the shop's labor rates. Typical parts for the Intake Camshaft Profile Actuator or its sensor may range from $100 to $300, while labor costs can vary from $80 to $150 per hour, depending on the shop type—dealerships generally charge more than independent shops. Overall, total repair costs could range from $200 to $800, depending on the complexity of the issue and the necessary repairs.

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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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