Engine-Codes.com
Engine-Codes – GMC – P3427 2018 GMC Sierra

P3427 2018 GMC Sierra Code - Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage

Quick Answer

The diagnostic trouble code P3427 for a 2018 GMC Sierra indicates an issue with the Cylinder 4 Deactivation Solenoid Valve Control Circuit, specifically detecting low voltage. Common causes include Faulty Cylinder 4 Deactivation Solenoid Valve, Wiring or connector issues in the control circuit, Low engine oil level or poor oil quality. 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
P3427 2018 GMC Sierra indicates Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage.
Common causes
Common causes include Faulty Cylinder 4 Deactivation Solenoid Valve, Wiring or connector issues in the control circuit, Low engine oil level or poor oil quality.
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 Aug 30, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P3427 2018 GMC Sierra Description

The diagnostic trouble code P3427 for a 2018 GMC Sierra indicates an issue with the Cylinder 4 Deactivation Solenoid Valve Control Circuit, specifically detecting low voltage. This part of the engine management system is responsible for controlling the deactivation of the cylinder to improve fuel efficiency during light load conditions. When the voltage is too low, it can lead to improper cylinder deactivation, affecting the engine's performance and efficiency.

OBDII Code P3427 2018 GMC Sierra - Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage
P3427 2018 GMC Sierra Code - Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage

Common Causes of P3427 2018 GMC Sierra

  1. Faulty Cylinder 4 Deactivation Solenoid Valve
  2. Wiring or connector issues in the control circuit
  3. Low engine oil level or poor oil quality
  4. Electrical system malfunctions
  5. Engine computer (ECU) failure

Symptoms of P3427 2018 GMC Sierra

  1. Check Engine Light illuminated on the dashboard
  2. Reduced fuel efficiency
  3. Engine misfires or rough idling
  4. Loss of power during acceleration
  5. Engine stalling or hesitation

How to Fix P3427 2018 GMC Sierra

  1. Begin by diagnosing the specific cause of the low voltage issue in the Cylinder 4 Deactivation Solenoid Valve Control Circuit.
  2. Check the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  3. Test the Cylinder 4 Deactivation Solenoid Valve for proper functionality and replace it if faulty.
  4. Inspect the engine oil level and quality, ensuring it meets the manufacturer's specifications.
  5. Reset the trouble code and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P3427 2018 GMC Sierra

The typical repair costs for addressing the Cylinder 4 Deactivation Solenoid Valve Control Circuit low voltage issue can range from $150 to $400, depending on the specific cause of the problem and the cost of parts and labor. Additional costs may be incurred if other components need to be replaced or if further diagnosis is required. It's advisable to consult with a trusted mechanic or dealership for an accurate cost estimate based on your vehicle's make and model.

Need more information about the P3427 2018 GMC Sierra code?

Need more information on how to fix the P3427 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P3427 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P3427 2018 GMC Sierra Code

1. What are common symptoms of OBDII code P3427 in a 2018 GMC Sierra?

- Common symptoms include rough idling, decreased fuel efficiency, engine misfires, and the activation of the Check Engine Light.

2. What does the OBDII code P3427 indicate in a 2018 GMC Sierra?

- The code P3427 indicates a low voltage condition in the control circuit of the Cylinder 4 Deactivation Solenoid Valve.

3. What are some possible causes of OBDII code P3427 in a 2018 GMC Sierra?

- Possible causes include a faulty cylinder 4 deactivation solenoid valve, damaged wiring or connectors in the circuit, low engine oil levels, or a malfunctioning engine control module (ECM).

4. How can I diagnose the Cylinder 4 Deactivation Solenoid Valve Control Circuit low voltage issue in my 2018 GMC Sierra?

- Diagnosing the issue involves checking the solenoid valve, inspecting the wiring and connectors for damage, testing the voltage in the circuit, and scanning the ECM for related fault codes.

5. Can I continue driving my 2018 GMC Sierra with OBDII code P3427?

- It is not recommended to continue driving with the P3427 code present, as it can lead to further engine damage and decreased performance if left unresolved.

6. How can I repair OBDII code P3427 in my 2018 GMC Sierra?

- Repairing the code may involve replacing the cylinder 4 deactivation solenoid valve, repairing or replacing damaged wiring or connectors, ensuring proper engine oil levels, or reprogramming the ECM.

7. Is it safe to clear the OBDII code P3427 in a 2018 GMC Sierra without fixing the underlying issue?

- Clearing the code without addressing the underlying issue is not recommended, as the problem will likely reoccur, potentially causing more severe engine issues over time.

8. How much does it cost to repair OBDII code P3427 in a 2018 GMC Sierra?

- Repair costs can vary depending on the exact cause of the issue, but it may range from $100 to $500 or more, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P3427 in a 2018 GMC Sierra?

- Depending on their skill level and access to tools, a DIY enthusiast may be able to address simpler causes like checking and replacing the solenoid valve or repairing wiring, but more complex issues may require professional assistance.

10. What preventive maintenance steps can I take to avoid OBDII code P3427 in my 2018 GMC Sierra?

- Regularly servicing the engine, checking and maintaining proper oil levels, and promptly addressing any engine performance issues can help prevent the occurrence of code P3427 in your GMC Sierra.

Discuss the causes and fixes for P3427 2018 GMC Sierra OBDII Code

Submit a New Comment

Code P3427 2018 GMC Sierra comments

No comments found for this page.