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Engine-Codes – GMC – P3402 2015 GMC Sierra

P3402 2015 GMC Sierra Code - Cylinder 1 Deactivation Solenoid Valve Control Performance

Quick Answer

The P3402 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates an issue with the Cylinder 1 Deactivation Solenoid Valve Control Performance. Common causes include Faulty Cylinder 1 Deactivation Solenoid Valve, Electrical issues such as wiring or connector problems, Mechanical issues with the solenoid valve. 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 2015 GMC Sierra indicates Cylinder 1 Deactivation Solenoid Valve Control Performance.
Common causes
Common causes include Faulty Cylinder 1 Deactivation Solenoid Valve, Electrical issues such as wiring or connector problems, Mechanical issues with the solenoid valve.
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 13, 2024
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Code P3402 2015 GMC Sierra Description

The P3402 diagnostic trouble code (DTC) for a 2015 GMC Sierra indicates an issue with the Cylinder 1 Deactivation Solenoid Valve Control Performance. In vehicles equipped with cylinder deactivation technology, such as GM's Active Fuel Management (AFM) system, certain cylinders are deactivated under light load conditions to improve fuel efficiency. The solenoid valve controls the oil flow to the lifters, which in turn deactivate the cylinders.

OBDII Code P3402 2015 GMC Sierra - Cylinder 1 Deactivation Solenoid Valve Control Performance
P3402 2015 GMC Sierra Code - Cylinder 1 Deactivation Solenoid Valve Control Performance

Common Causes of P3402 2015 GMC Sierra

  1. Faulty Cylinder 1 Deactivation Solenoid Valve
  2. Electrical issues such as wiring or connector problems
  3. Mechanical issues with the solenoid valve
  4. Clogged oil passages in the engine
  5. Engine oil contamination

Symptoms of P3402 2015 GMC Sierra

  1. Check Engine Light illuminated
  2. Rough idling
  3. Reduced fuel efficiency
  4. Engine misfires
  5. Lack of power or hesitation during acceleration

How to Fix P3402 2015 GMC Sierra

  1. Begin by diagnosing the specific cause of the issue using a scan tool to verify the P3402 code.
  2. Inspect the wiring and connectors associated with the Cylinder 1 Deactivation Solenoid Valve for any damage or corrosion.
  3. Test the solenoid valve itself to ensure it is functioning properly. Replace if necessary.
  4. Check for any clogs in the oil passages and clean them out if needed.
  5. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P3402 2015 GMC Sierra

The cost of repairing the Cylinder 1 Deactivation Solenoid Valve Control Performance issue can vary depending on the specific cause and the labor rates in your area. Generally, the cost of parts for this repair can range from $100 to $300, while labor costs can range from $100 to $300 as well. Overall, you can expect to pay anywhere from $200 to $600 for this repair. Keep in mind that these are rough estimates and actual costs may vary. It's recommended to consult with a trusted mechanic or auto repair shop for a more accurate quote.

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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.

Frequently Asked Questions about P3402 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P3402 in a 2015 GMC Sierra related to the Cylinder 1 Deactivation Solenoid Valve Control Performance?

- Common symptoms may include rough idling, reduced engine performance, and the illumination of the check engine light on the dashboard.

2. What are potential causes of OBDII code P3402 in a 2015 GMC Sierra?

- Possible causes can include a faulty cylinder 1 deactivation solenoid, wiring issues, poor electrical connections, or problems with the engine control module.

3. How serious is OBDII code P3402 in a 2015 GMC Sierra?

- While the vehicle may still be operable with this code, it is important to address it promptly to prevent potential damage to the engine or catalytic converter.

4. Can I continue driving my 2015 GMC Sierra with OBDII code P3402 present?

- It is generally not recommended to continue driving the vehicle with this code active, as it can lead to further engine issues if left unresolved.

5. How can I diagnose OBDII code P3402 in my 2015 GMC Sierra?

- Proper diagnostic steps involve using a scan tool to retrieve the code, checking the cylinder 1 deactivation solenoid, inspecting related wiring, and verifying connections for any faults.

6. What is the typical repair process for OBDII code P3402 in a 2015 GMC Sierra?

- Repairs may involve replacing the faulty cylinder 1 deactivation solenoid, repairing damaged wiring or connectors, and clearing the trouble code from the vehicle's computer.

7. Is it possible to reset OBDII code P3402 in a 2015 GMC Sierra without fixing the underlying issue?

- While clearing the code temporarily may be possible, it is crucial to address the root cause to prevent the code from reappearing and causing potential engine problems.

8. Can a DIY enthusiast fix OBDII code P3402 in a 2015 GMC Sierra?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code by replacing the cylinder 1 deactivation solenoid and performing necessary repairs.

9. How much does it typically cost to repair OBDII code P3402 in a 2015 GMC Sierra at a professional mechanic or dealership?

- Repair costs can vary but may include parts and labor, with an estimated range of $200 to $500 or more, depending on the extent of the issue and local labor rates.

10. Are there any preventive maintenance tips to avoid OBDII code P3402 in a 2015 GMC Sierra in the future?

- Regular maintenance, such as checking and replacing engine components as recommended by the manufacturer, can help prevent issues like OBDII code P3402 from occurring.

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