P3402 2018 GMC Sierra Code - Cylinder 1 Deactivation Solenoid Valve Control Performance
Quick Answer
The P3402 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Cylinder 1 Deactivation Solenoid Valve Control Performance. Common causes include Faulty Cylinder 1 Deactivation Solenoid Valve, Wiring or electrical issues, Poor connection or corrosion in the solenoid valve circuit. 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
- P3402 2018 GMC Sierra indicates Cylinder 1 Deactivation Solenoid Valve Control Performance.
- Common causes
- Common causes include Faulty Cylinder 1 Deactivation Solenoid Valve, Wiring or electrical issues, Poor connection or corrosion in the solenoid valve circuit.
- 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 P3402 2018 GMC Sierra Description
The P3402 diagnostic trouble code (DTC) for a 2018 GMC Sierra indicates an issue with the Cylinder 1 Deactivation Solenoid Valve Control Performance. This code is specific to vehicles equipped with cylinder deactivation technology, which is designed to improve fuel efficiency by deactivating cylinders when they are not needed. The solenoid valve controls the activation and deactivation of cylinders, allowing the engine to operate in a more efficient manner.
Common Causes of P3402 2018 GMC Sierra
- Faulty Cylinder 1 Deactivation Solenoid Valve
- Wiring or electrical issues
- Poor connection or corrosion in the solenoid valve circuit
- Engine oil sludge or debris affecting solenoid valve operation
- Software or programming issues in the engine control module
Symptoms of P3402 2018 GMC Sierra
- Check Engine Light illuminated
- Reduced fuel efficiency
- Engine misfires
- Rough idling
- Loss of power under acceleration
How to Fix P3402 2018 GMC Sierra
- Begin by conducting a visual inspection of the solenoid valve and its wiring harness for any signs of damage or corrosion.
- Use a multimeter to test the solenoid valve for proper resistance and continuity.
- Check for any engine oil sludge or debris that may be affecting the solenoid valve operation and clean if necessary.
- If no issues are found with the solenoid valve or wiring, consider reprogramming the engine control module to address any software-related issues.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P3402 2018 GMC Sierra
The typical repair costs for addressing a P3402 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of replacing a faulty solenoid valve can range from $150 to $300, including parts and labor. Additional costs may apply if wiring repairs or reprogramming of the engine control module are necessary. It is recommended to consult with a professional mechanic or dealership for a more accurate cost estimate based on your vehicle's specific needs. Keep in mind that labor rates can vary between different auto repair shops, so it's advisable to inquire about rates in your local area.
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Frequently Asked Questions about P3402 2018 GMC Sierra Code
1. What does OBDII code P3402 mean on a 2018 GMC Sierra?
P3402 indicates an issue with the Cylinder 1 Deactivation Solenoid Valve Control Performance, often related to the Active Fuel Management (AFM) system.
2. What are the common symptoms of code P3402 on a 2018 GMC Sierra?
Symptoms include reduced engine performance, poor fuel economy, a rough idle, and an illuminated check engine light.
3. What causes the P3402 code to appear on a 2018 GMC Sierra?
Common causes include a faulty cylinder deactivation solenoid, low oil pressure, clogged oil passages, or a malfunctioning engine control module (ECM).
4. Can low oil pressure trigger the P3402 code?
Yes, low oil pressure can prevent the deactivation solenoid from functioning properly, leading to the P3402 code.
5. How is the P3402 code diagnosed on a 2018 GMC Sierra?
Technicians diagnose it by using a scan tool to check for related codes, inspecting the solenoid and wiring, and verifying proper oil pressure.
6. Can I drive my 2018 GMC Sierra with the P3402 code active?
Driving with this code is not recommended as it may lead to further engine damage or decreased fuel efficiency.
7. How do I fix the P3402 code on my 2018 GMC Sierra?
Repairs may include replacing the cylinder 1 deactivation solenoid, cleaning oil passages, or addressing low oil pressure by changing the oil and filter.
8. Is the P3402 code related to the Active Fuel Management (AFM) system?
Yes, the code is directly connected to the AFM system, which deactivates certain cylinders to improve fuel efficiency.
9. What tools are needed to repair the P3402 code on a 2018 GMC Sierra?
You may need a diagnostic scan tool, oil pressure gauge, and basic hand tools to inspect and replace faulty components.
10. How much does it cost to repair the P3402 code on a 2018 GMC Sierra?
Repair costs can vary but typically range from $150 to $500, depending on whether the issue is with the solenoid, oil system, or wiring.
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