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Engine-Codes – GMC – P3425 2016 GMC Sierra

P3425 2016 GMC Sierra Code - Cylinder 4 Deactivation Solenoid Valve Control Circuit

Quick Answer

The P3425 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Cylinder 4 Deactivation Solenoid Valve Control Circuit. Common causes include Faulty cylinder deactivation solenoid valve, Wiring issues or shorts in the control circuit, 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
P3425 2016 GMC Sierra indicates Cylinder 4 Deactivation Solenoid Valve Control Circuit.
Common causes
Common causes include Faulty cylinder deactivation solenoid valve, Wiring issues or shorts in the control circuit, 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 14, 2024
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Code P3425 2016 GMC Sierra Description

The P3425 diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Cylinder 4 Deactivation Solenoid Valve Control Circuit. This code indicates that there is an issue with the control circuit for the solenoid valve responsible for deactivating cylinder 4 in the engine. In vehicles equipped with cylinder deactivation technology, certain cylinders can be shut off under light load conditions to improve fuel efficiency. The solenoid valve controls the flow of oil to the mechanism that activates or deactivates the cylinder.

OBDII Code P3425 2016 GMC Sierra - Cylinder 4 Deactivation Solenoid Valve Control Circuit
P3425 2016 GMC Sierra Code - Cylinder 4 Deactivation Solenoid Valve Control Circuit

Common Causes of P3425 2016 GMC Sierra

  1. Faulty cylinder deactivation solenoid valve
  2. Wiring issues or shorts in the control circuit
  3. Defective Engine Control Module (ECM)
  4. Poor electrical connections
  5. Engine oil sludge or contamination affecting the solenoid valve

Symptoms of P3425 2016 GMC Sierra

  1. Reduced engine power
  2. Rough idling or vibrations
  3. Engine misfires
  4. Decreased fuel efficiency
  5. Stalling or hesitation during acceleration

How to Fix P3425 2016 GMC Sierra

  1. Begin by conducting a thorough inspection of the cylinder 4 deactivation solenoid valve and its control circuit to identify any visible damage or wiring issues.
  2. Test the solenoid valve and control circuit using a multimeter to check for proper resistance and continuity.
  3. Replace the cylinder 4 deactivation solenoid valve if it is found to be faulty, ensuring proper installation and connection.
  4. Repair any damaged wiring or electrical connections in the control circuit to restore proper functionality.
  5. Clear the DTC with a scan tool and perform a test drive to confirm that the issue has been resolved.

Cost to Fix P3425 2016 GMC Sierra

The typical repair costs for addressing the Cylinder 4 Deactivation Solenoid Valve Control Circuit issue can vary depending on the specific cause of the problem. In general, replacing the solenoid valve and repairing any wiring issues may range from $200 to $500, including parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can fluctuate based on various factors, so it's advisable to inquire locally for a more accurate estimate. Keep in mind that rates may be higher at dealerships or metropolitan areas, while independent shops may offer more competitive prices.

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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 P3425 2016 GMC Sierra Code

1. What does the OBDII code P3425 mean for a 2016 GMC Sierra?

P3425 indicates an issue with the Cylinder 4 Deactivation Solenoid Valve Control Circuit, which is part of the Active Fuel Management (AFM) system that deactivates cylinders to improve fuel efficiency.

2. What are the symptoms of code P3425 in a 2016 GMC Sierra?

Common symptoms include reduced engine performance, poor fuel economy, a rough idle, or the Check Engine Light being illuminated.

3. What causes the P3425 code to appear in a 2016 GMC Sierra?

Potential causes include a faulty cylinder deactivation solenoid, damaged wiring or connectors in the circuit, low engine oil pressure, or a malfunctioning ECM.

4. Can I drive my 2016 GMC Sierra with the P3425 code active?

While the truck may still be drivable, driving with this code can cause further engine damage over time and should be addressed as soon as possible.

5. How do I diagnose the P3425 code in my 2016 GMC Sierra?

Diagnosis involves checking the wiring and connectors for damage, testing the cylinder 4 deactivation solenoid for proper function, and verifying oil pressure levels.

6. What repairs can fix the P3425 code on a 2016 GMC Sierra?

Repairs can include replacing the Cylinder 4 Deactivation Solenoid, repairing damaged wiring or connectors, updating the ECM software, or resolving oil pressure issues.

7. How much does it cost to fix a P3425 code on a 2016 GMC Sierra?

Repair costs vary but typically range from $150 to $400, depending on whether the solenoid or wiring needs replacement and labor costs.

8. Can low oil pressure cause the P3425 code in a 2016 GMC Sierra?

Yes, low oil pressure can prevent the cylinder deactivation solenoid from functioning properly, triggering the P3425 code.

9. Is the P3425 code related to the Active Fuel Management (AFM) system?

Yes, the P3425 code is directly related to the AFM system, specifically to the solenoid controlling Cylinder 4 deactivation.

10. Do I need special tools to fix the P3425 code on a 2016 GMC Sierra?

Basic tools like a multimeter, a scan tool to clear codes, and potentially an oil pressure gauge are needed. Specialized tools might be required for solenoid replacement.

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