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P3402 Chevrolet Code - Cylinder 1 Deactivation Solenoid Valve Control Performance

Quick Answer

The P3402 diagnostic trouble code (DTC) for Chevrolet vehicles specifically pertains to the Cylinder 1 Deactivation Solenoid Valve Control Performance. Common causes include Faulty Solenoid Valve: The most common cause of the P3402 code is a faulty cylinder 1 deactivation solenoid valve that is not functioning properly, Wiring Issues: Electrical problems such as damaged wiring or poor connections can prevent the solenoid valve from receiving the necessary signals from the ECM, Low Oil Pressure: Insufficient oil pressure can hinder the proper operation of the solenoid valve and lead to cylinder deactivation issues. 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
P3402 Chevrolet indicates Cylinder 1 Deactivation Solenoid Valve Control Performance.
Common causes
Common causes include Faulty Solenoid Valve: The most common cause of the P3402 code is a faulty cylinder 1 deactivation solenoid valve that is not functioning properly, Wiring Issues: Electrical problems such as damaged wiring or poor connections can prevent the solenoid valve from receiving the necessary signals from the ECM, Low Oil Pressure: Insufficient oil pressure can hinder the proper operation of the solenoid valve and lead to cylinder deactivation issues.
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 Sep 09, 2024
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Code P3402 Chevrolet Description

The P3402 diagnostic trouble code (DTC) for Chevrolet vehicles specifically pertains to the Cylinder 1 Deactivation Solenoid Valve Control Performance. This code indicates that there is an issue with the performance of the solenoid valve that controls the deactivation of cylinder 1 in the engine. In vehicles equipped with cylinder deactivation technology, also known as Active Fuel Management (AFM) or Variable Cylinder Management (VCM), certain cylinders are deactivated under light load conditions to improve fuel efficiency.

OBDII Code P3402 Chevrolet - Cylinder 1 Deactivation Solenoid Valve Control Performance
P3402 Chevrolet Code - Cylinder 1 Deactivation Solenoid Valve Control Performance

Common Causes of P3402 Chevrolet

  1. Faulty Solenoid Valve: The most common cause of the P3402 code is a faulty cylinder 1 deactivation solenoid valve that is not functioning properly.
  2. Wiring Issues: Electrical problems such as damaged wiring or poor connections can prevent the solenoid valve from receiving the necessary signals from the ECM.
  3. Low Oil Pressure: Insufficient oil pressure can hinder the proper operation of the solenoid valve and lead to cylinder deactivation issues.
  4. ECM Malfunction: A malfunctioning Engine Control Module (ECM) can also trigger the P3402 code if it is unable to properly control the solenoid valve.
  5. Mechanical Failure: Internal engine issues such as worn components or debris in the oil passages can also contribute to the cylinder deactivation solenoid valve not working correctly.

Symptoms of P3402 Chevrolet

  1. Check Engine Light: The most common symptom associated with the P3402 code is the illumination of the Check Engine Light on the vehicle's dashboard.
  2. Reduced Fuel Efficiency: Due to improper cylinder deactivation, the engine may experience reduced fuel efficiency, leading to more frequent refueling.
  3. Engine Misfires: The engine may experience misfires or rough idling due to the cylinder deactivation not functioning correctly.
  4. Decreased Performance: The vehicle may exhibit decreased performance, such as sluggish acceleration or a lack of power, as a result of the cylinder deactivation issue.

How to Fix P3402 Chevrolet

  1. Diagnose the Issue: Begin by using a scan tool to retrieve the DTCs and pinpoint the exact cause of the P3402 code. Check the solenoid valve, wiring, oil pressure, and ECM for any faults.
  2. Replace the Solenoid Valve: If the solenoid valve is found to be faulty, it will need to be replaced. This typically involves removing the intake manifold to access the valve.
  3. Repair Wiring: If wiring issues are detected, repair or replace any damaged wiring to ensure proper electrical connections to the solenoid valve.
  4. Check Oil Pressure: Verify that the engine has proper oil pressure, as low oil pressure can affect the performance of the solenoid valve. Address any oil pressure issues as needed.
  5. Reset the ECM: After completing the repairs, clear the DTCs and reset the ECM to ensure that the P3402 code does not return.

Cost to Fix P3402 Chevrolet

The typical repair costs for addressing the P3402 code can vary depending on the root cause of the issue and the specific components that need to be replaced. In general, replacing the cylinder 1 deactivation solenoid valve can cost anywhere from $150 to $300 for the part, with additional labor costs ranging from $100 to $200. Overall, the total repair costs for resolving the P3402 code can range from $250 to $500, including parts and labor.

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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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