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Engine-Codes – GMC – P3427 2016 GMC Sierra

P3427 2016 GMC Sierra Code - Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage

Quick Answer

The P3427 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Cylinder 4 Deactivation Solenoid Valve Control Circuit registering low voltage. Common causes include Faulty cylinder deactivation solenoid valve, Wiring issues or electrical connection problems, Defective engine control module (ECM). 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 2016 GMC Sierra indicates Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage.
Common causes
Common causes include Faulty cylinder deactivation solenoid valve, Wiring issues or electrical connection problems, Defective engine control module (ECM).
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 P3427 2016 GMC Sierra Description

The P3427 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Cylinder 4 Deactivation Solenoid Valve Control Circuit registering low voltage. This code indicates that there is an issue with the electrical circuit controlling the deactivation solenoid valve for cylinder 4 in the engine. In vehicles equipped with cylinder deactivation technology, such as GM's Active Fuel Management (AFM) system, certain cylinders can be deactivated under light load conditions to improve fuel efficiency. The solenoid valve controls the oil flow to the lifters, which in turn deactivate the cylinder.

OBDII Code P3427 2016 GMC Sierra - Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage
P3427 2016 GMC Sierra Code - Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage

Common Causes of P3427 2016 GMC Sierra

  1. Faulty cylinder deactivation solenoid valve
  2. Wiring issues or electrical connection problems
  3. Defective engine control module (ECM)
  4. Low engine oil level or poor oil quality
  5. Mechanical issues with the cylinder deactivation system components

Symptoms of P3427 2016 GMC Sierra

  1. Reduced fuel efficiency
  2. Rough idling or vibrations
  3. Decreased power output
  4. Engine misfires
  5. Illumination of the check engine light

How to Fix P3427 2016 GMC Sierra

  1. Begin by conducting a visual inspection of the wiring harness and connectors related to the cylinder 4 deactivation solenoid valve. Look for any signs of damage, corrosion, or loose connections.
  2. Test the solenoid valve itself to determine if it is functioning properly. This can be done using a multimeter to check for continuity and proper resistance.
  3. If the solenoid valve is found to be faulty, it will need to be replaced. Ensure that the new part is compatible with the specific make and model of the vehicle.
  4. Clear the DTC and reset the ECM to see if the issue persists. If the code reappears, further diagnostics may be necessary to identify any underlying issues with the system.
  5. If the problem persists after replacing the solenoid valve and checking the wiring, it may be necessary to inspect other components of the cylinder deactivation system, such as the lifters or oil passages.

Cost to Fix P3427 2016 GMC Sierra

The cost of repairing a P3427 DTC on a 2016 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. Generally, the price for parts such as a new solenoid valve can range from $50 to $150, while labor costs can add an additional $100 to $200. Overall, you can expect to pay anywhere from $150 to $350 for this repair. Keep in mind that these estimates are rough averages and actual costs may differ based on your location and the specific circumstances of your vehicle. It's recommended to consult with a professional mechanic for a more accurate cost estimate.

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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 P3427 2016 GMC Sierra Code

1. What does the OBDII code P3427 mean on a 2016 GMC Sierra?

P3427 indicates a Cylinder 4 Deactivation Solenoid Valve Control Circuit Low Voltage issue, meaning the system detects low voltage in the circuit controlling the cylinder deactivation solenoid for cylinder 4.

2. What are the common symptoms of code P3427 on a 2016 GMC Sierra?

Symptoms include reduced engine performance, poor fuel economy, rough idling, an illuminated check engine light, and possible misfires.

3. What causes the P3427 code on a 2016 GMC Sierra?

Common causes include a faulty cylinder 4 deactivation solenoid, wiring issues like damaged or corroded wires, a malfunctioning ECM, or low oil pressure affecting the solenoid's operation.

4. Can low oil pressure cause the P3427 code?

Yes, low oil pressure can prevent the cylinder deactivation solenoid from working correctly, leading to this code.

5. How can I diagnose the P3427 code on my 2016 GMC Sierra?

Start by checking the oil level and pressure, inspecting the wiring and connectors for damage or corrosion, testing the cylinder 4 solenoid for proper operation, and verifying ECM functionality.

6. Can a faulty cylinder deactivation solenoid trigger the P3427 code?

Yes, a defective solenoid can cause the circuit to experience low voltage, triggering the P3427 code.

7. How do I fix the P3427 code on a 2016 GMC Sierra?

Repairs may include replacing the cylinder 4 deactivation solenoid, repairing or replacing damaged wiring, cleaning corroded connectors, or addressing low oil pressure issues.

8. Is it safe to drive with the P3427 code on my 2016 GMC Sierra?

Driving with this code is not recommended, as it can lead to engine performance issues and potential damage if the problem is not resolved.

9. How much does it cost to fix the P3427 code on a 2016 GMC Sierra?

Repair costs vary but typically range from $100 to $300 for parts and labor, depending on whether the solenoid, wiring, or another component is at fault.

10. Can a software update fix the P3427 code on a 2016 GMC Sierra?

In rare cases, a software update to the ECM may resolve the issue if it’s related to incorrect programming, but hardware issues are more common with this code.

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