P3428 2018 GMC Sierra Code - Cylinder 4 Deactivation Solenoid Valve Control Circuit High Voltage
Quick Answer
The diagnostic trouble code P3428 in a 2018 GMC Sierra indicates a problem with the Cylinder 4 Deactivation Solenoid Valve Control Circuit, specifically detecting high voltage. Common causes include Faulty cylinder deactivation solenoid valve, Wiring issues in the control circuit, Corrosion or poor connections in the electrical system. 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 2018 GMC Sierra indicates Cylinder 4 Deactivation Solenoid Valve Control Circuit High Voltage.
- Common causes
- Common causes include Faulty cylinder deactivation solenoid valve, Wiring issues in the control circuit, Corrosion or poor connections in the electrical system.
- 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.
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Code P3428 2018 GMC Sierra Description
The diagnostic trouble code P3428 in a 2018 GMC Sierra indicates a problem with the Cylinder 4 Deactivation Solenoid Valve Control Circuit, specifically detecting high voltage. This code is related to the engine's cylinder deactivation system, which is designed to improve fuel efficiency by deactivating specific cylinders under light load conditions. The solenoid valve controls the flow of oil to the lifters that deactivate the cylinders.
Common Causes of P3428 2018 GMC Sierra
- Faulty cylinder deactivation solenoid valve
- Wiring issues in the control circuit
- Corrosion or poor connections in the electrical system
- Engine oil contamination affecting the solenoid valve
- ECM (Engine Control Module) malfunction
Symptoms of P3428 2018 GMC Sierra
- Decreased fuel efficiency
- Engine misfires
- Rough idling
- Check engine light illuminated
- Reduced engine power
How to Fix P3428 2018 GMC Sierra
- Begin by diagnosing the specific cause of the high voltage in the solenoid valve control circuit using a scan tool to pinpoint the issue.
- Inspect the wiring harness and connections for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the cylinder deactivation solenoid valve for proper operation and replace if faulty.
- Clear the trouble code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, further diagnostic testing may be required to identify any underlying issues with the engine control system.
Cost to Fix P3428 2018 GMC Sierra
The typical repair costs for addressing a P3428 code in a 2018 GMC Sierra can range from $200 to $500, including parts and labor. However, it's important to note that actual costs can vary depending on the specific diagnosis time and labor rates at auto repair shops. Rates typically range between $80 and $150 per hour, with higher rates in metropolitan areas or at dealerships, and lower rates at independent shops. It's recommended to obtain quotes from local shops for a more accurate estimate.
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Frequently Asked Questions about P3428 2018 GMC Sierra Code
1. What does the OBDII code P3428 mean on a 2018 GMC Sierra?
P3428 indicates a problem with the Cylinder 4 Deactivation Solenoid Valve Control Circuit, specifically a high voltage issue.
2. What are the symptoms of a P3428 code on a 2018 GMC Sierra?
Common symptoms include reduced engine performance, rough idling, poor fuel efficiency, and an illuminated check engine light.
3. What causes a P3428 code on a 2018 GMC Sierra?
Potential causes include a faulty deactivation solenoid, damaged wiring or connectors, a malfunctioning PCM (Powertrain Control Module), or electrical issues like a short circuit.
4. Can I drive my 2018 GMC Sierra with a P3428 code?
While the vehicle may still be drivable, prolonged driving with this code can lead to further engine damage or poor performance. It’s best to address the issue promptly.
5. How do you diagnose a P3428 code on a GMC Sierra?
Diagnosis typically involves checking the solenoid, inspecting circuit wiring and connectors for damage, and testing the PCM for proper voltage signals.
6. How is a P3428 code fixed on a 2018 GMC Sierra?
Repairs may include replacing the Cylinder 4 deactivation solenoid, repairing or replacing damaged wiring, or reprogramming or replacing the PCM if necessary.
7. How much does it cost to repair a P3428 code on a GMC Sierra?
Repair costs vary depending on the issue but can range from $100 for wiring repairs to $500 or more if the solenoid or PCM needs replacing.
8. What tools are needed to fix a P3428 code on a GMC Sierra?
You’ll need an OBDII scanner, a multimeter for voltage testing, and basic automotive tools to access and replace components.
9. Can a P3428 code be caused by a low battery voltage?
While unlikely, electrical issues such as a weak battery or alternator problem could contribute to the code. It’s worth checking the vehicle’s overall electrical system.
10. How can I prevent a P3428 code from recurring on my GMC Sierra?
Regular maintenance, including inspecting wiring and connectors and ensuring the engine management system is functioning properly, can help prevent this code from recurring.
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