P3402 2017 GMC Sierra Code - Cylinder 1 Deactivation Solenoid Valve Control Performance
Quick Answer
The P3402 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates an issue with the Cylinder 1 Deactivation Solenoid Valve Control Performance. Common causes include Faulty cylinder deactivation solenoid valve, Wiring issues or electrical connections related to the solenoid valve, Low engine oil level or poor oil quality. 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 2017 GMC Sierra indicates Cylinder 1 Deactivation Solenoid Valve Control Performance.
- Common causes
- Common causes include Faulty cylinder deactivation solenoid valve, Wiring issues or electrical connections related to the solenoid valve, Low engine oil level or poor oil quality.
- 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 2017 GMC Sierra Description
The P3402 diagnostic trouble code (DTC) in a 2017 GMC Sierra indicates an issue with the Cylinder 1 Deactivation Solenoid Valve Control Performance. This code is specifically related to the operation of the 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 P3402 2017 GMC Sierra
- Faulty cylinder deactivation solenoid valve
- Wiring issues or electrical connections related to the solenoid valve
- Low engine oil level or poor oil quality
- Mechanical issues with the cylinder deactivation system components
- ECM software or programming issues
Symptoms of P3402 2017 GMC Sierra
- Reduced fuel efficiency
- Engine misfires
- Rough idling
- Loss of power
- Check Engine Light illuminated
How to Fix P3402 2017 GMC Sierra
- Perform a visual inspection of the solenoid valve and wiring harness for any visible damage or corrosion.
- Test the solenoid valve using a multimeter to check for proper resistance and continuity.
- Verify the oil level and quality in the engine, ensuring it meets manufacturer specifications.
- Inspect and test other components of the cylinder deactivation system, such as lifters and actuators, for proper operation.
- Clear the DTC and reset the ECM after completing repairs and test driving the vehicle to ensure the issue has been resolved.
Cost to Fix P3402 2017 GMC Sierra
The typical repair costs for addressing a P3402 DTC in a 2017 GMC Sierra can range from $200 to $500, depending on the specific cause of the issue and the required repairs. This estimate includes parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check local rates for a more accurate estimate. Additionally, factors such as location, vehicle make and model, and engine type can also impact the overall repair costs.
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Frequently Asked Questions about P3402 2017 GMC Sierra Code
1. What does the OBDII code P3402 mean on a 2017 GMC Sierra?
P3402 refers to a problem with the Cylinder 1 Deactivation Solenoid Valve Control, indicating it isn’t performing as expected during cylinder deactivation.
2. What are the common symptoms of code P3402 in a 2017 GMC Sierra?
Symptoms include reduced engine performance, poor fuel economy, the check engine light turning on, and possible engine misfires or rough idling.
3. What causes the P3402 code to appear?
Common causes include a faulty cylinder deactivation solenoid, low engine oil pressure, clogged oil passages, or a malfunctioning engine control module (ECM).
4. How do I diagnose the P3402 code?
Start by scanning for related trouble codes, inspecting the cylinder 1 deactivation solenoid for damage, checking oil levels and pressure, and testing the wiring and connectors for faults.
5. Can low oil cause the P3402 code on a 2017 GMC Sierra?
Yes, low oil levels or poor oil quality can lead to insufficient pressure, affecting the operation of the deactivation solenoid and triggering this code.
6. How do I fix the P3402 code in my GMC Sierra?
Repairs may include replacing the cylinder 1 deactivation solenoid, cleaning or repairing clogged oil passages, performing an oil change, or repairing damaged wiring or connectors.
7. Is it safe to drive with the P3402 code active?
While the vehicle might still be drivable, ignoring the code can lead to engine damage or further performance issues. It’s best to address the issue promptly.
8. How much does it cost to repair code P3402 on a 2017 GMC Sierra?
Costs vary depending on the cause, but solenoid replacement typically ranges from $150 to $300, including parts and labor. Additional repairs may increase the cost.
9. Can a software issue cause the P3402 code?
Yes, a malfunctioning ECM or outdated software can sometimes cause the P3402 code. Reflashing or reprogramming the ECM may be necessary.
10. How can I prevent the P3402 code from recurring?
Regularly maintain your vehicle with timely oil changes, use the correct oil grade, and check for any signs of wear or damage in the deactivation system components.
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