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P3428 2015 GMC Sierra Code - Cylinder 4 Deactivation Solenoid Valve Control Circuit High Voltage

Quick Answer

The P3428 diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Cylinder 4 Deactivation Solenoid Valve Control Circuit registering high voltage. Common causes include Faulty cylinder 4 deactivation solenoid valve, Wiring or connector issues in the control circuit, Malfunctioning 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
P3428 2015 GMC Sierra indicates Cylinder 4 Deactivation Solenoid Valve Control Circuit High Voltage.
Common causes
Common causes include Faulty cylinder 4 deactivation solenoid valve, Wiring or connector issues in the control circuit, Malfunctioning 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 29, 2024
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Code P3428 2015 GMC Sierra Description

The P3428 diagnostic trouble code (DTC) for a 2015 GMC Sierra relates to the Cylinder 4 Deactivation Solenoid Valve Control Circuit registering high voltage. In vehicles equipped with cylinder deactivation technology, such as GM's Active Fuel Management (AFM) system, certain cylinders can be deactivated to improve fuel efficiency during light load conditions. The solenoid valve controls the flow of oil to the lifters, which in turn control the activation and deactivation of specific cylinders. When the control circuit for the cylinder 4 deactivation solenoid valve detects high voltage, it indicates a malfunction in the system's operation.

OBDII Code P3428 2015 GMC Sierra - Cylinder 4 Deactivation Solenoid Valve Control Circuit High Voltage
P3428 2015 GMC Sierra Code - Cylinder 4 Deactivation Solenoid Valve Control Circuit High Voltage

Common Causes of P3428 2015 GMC Sierra

  1. Faulty cylinder 4 deactivation solenoid valve
  2. Wiring or connector issues in the control circuit
  3. Malfunctioning engine control module (ECM)
  4. Mechanical problems within the cylinder deactivation system
  5. Electrical interference or shorts in the system

Symptoms of P3428 2015 GMC Sierra

  1. Reduced fuel efficiency
  2. Rough idling or engine misfires
  3. Decreased power output
  4. Check engine light illuminated
  5. Engine may run in a reduced power mode

How to Fix P3428 2015 GMC Sierra

  1. Begin by conducting a thorough inspection of the cylinder 4 deactivation solenoid valve, wiring, and connectors for any visible damage or loose connections.
  2. Use a multimeter to test the voltage and continuity in the control circuit to identify any abnormalities.
  3. If necessary, replace the faulty cylinder 4 deactivation solenoid valve and repair any damaged wiring or connectors.
  4. Clear the DTC from the vehicle's ECM memory and perform a test drive to ensure that the issue has been resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying mechanical issues with the cylinder deactivation system.

Cost to Fix P3428 2015 GMC Sierra

The typical repair costs for addressing a P3428 DTC on a 2015 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty solenoid valve and addressing wiring or connector problems may cost between $200 and $500, including parts and labor. However, if the ECM needs to be replaced or more extensive repairs are necessary, the total cost could exceed $1000. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local providers for a more accurate 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 P3428 2015 GMC Sierra Code

1. What does the OBDII code P3428 mean on a 2015 GMC Sierra?

The P3428 code indicates a problem with the Cylinder 4 Deactivation Solenoid Valve Control Circuit, specifically a high voltage condition.

2. What are the common symptoms of code P3428 in a 2015 GMC Sierra?

Symptoms may include reduced engine performance, a rough idle, poor fuel efficiency, the Check Engine Light turning on, and possible misfires.

3. What causes the P3428 code on a 2015 GMC Sierra?

Common causes include a faulty Cylinder 4 Deactivation Solenoid, damaged wiring or connectors in the circuit, a malfunctioning ECM, or low oil pressure.

4. Can low oil pressure trigger the P3428 code in a 2015 GMC Sierra?

Yes, low oil pressure can cause issues with the deactivation solenoid, leading to this code.

5. How do you diagnose the P3428 code in a 2015 GMC Sierra?

Diagnosis typically involves scanning for codes, inspecting the wiring and connectors, testing the solenoid for proper operation, and checking oil pressure levels.

6. Is it safe to drive with the P3428 code on a 2015 GMC Sierra?

While it may be possible to drive, it is not recommended as the engine may experience reduced performance and further damage could occur.

7. How do you fix the P3428 code on a 2015 GMC Sierra?

Repairs may involve replacing the Cylinder 4 Deactivation Solenoid, repairing or replacing damaged wiring, updating the ECM, or addressing low oil pressure.

8. How much does it cost to repair the P3428 code on a 2015 GMC Sierra?

Repair costs vary but typically range from $100 to $500 depending on whether the solenoid, wiring, or another component needs replacement.

9. Can a dirty oil filter cause the P3428 code in a 2015 GMC Sierra?

Yes, a clogged oil filter can reduce oil flow and pressure, potentially affecting the solenoid’s operation and triggering the code.

10. What happens if the P3428 code is ignored on a 2015 GMC Sierra?

Ignoring the code can lead to further engine performance issues, increased fuel consumption, and potential damage to internal components over time.

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