P3420 Chevrolet Code - Cylinder 3 Deactivation/Intake Valve Control Circuit High
Quick Answer
The P3420 code for Chevrolet vehicles indicates an issue with the Cylinder 3 Deactivation/Intake Valve Control Circuit being too high. Common causes include Faulty intake valve control solenoid, Damaged wiring or connectors in the circuit, Engine control module (ECM) malfunction. 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
- P3420 Chevrolet indicates Cylinder 3 Deactivation/Intake Valve Control Circuit High.
- Common causes
- Common causes include Faulty intake valve control solenoid, Damaged wiring or connectors in the circuit, Engine control module (ECM) malfunction.
- 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 P3420 Chevrolet Description
The P3420 code for Chevrolet vehicles indicates an issue with the Cylinder 3 Deactivation/Intake Valve Control Circuit being too high. This code is typically found in vehicles equipped with cylinder deactivation technology, which is designed to improve fuel efficiency by deactivating certain cylinders under light load conditions. In this case, the code specifically refers to cylinder 3, indicating a problem with the intake valve control circuit for that cylinder.
Common Causes of P3420 Chevrolet
- Faulty intake valve control solenoid
- Damaged wiring or connectors in the circuit
- Engine control module (ECM) malfunction
- Clogged oil passages related to cylinder deactivation system
- Mechanical issues with cylinder 3
Symptoms of P3420 Chevrolet
- Rough engine idle
- Loss of power and acceleration
- Stalling or hesitation during acceleration
- Reduced fuel efficiency
- Illumination of the Check Engine Light
How to Fix P3420 Chevrolet
- Begin by using a scan tool to verify the P3420 code and check for any other related codes.
- Inspect the intake valve control solenoid and its wiring for any signs of damage or corrosion. Replace if necessary.
- Check the engine control module (ECM) for proper operation and reprogram if needed.
- Clean out any clogged oil passages related to the cylinder deactivation system.
- Test drive the vehicle to ensure the issue has been resolved and clear the code from the ECM.
Cost to Fix P3420 Chevrolet
The typical repair costs for addressing a P3420 code on a Chevrolet vehicle can range from $200 to $500, depending on the specific cause of the issue and the labor rates at the auto repair shop. This estimate includes the cost of parts such as a new intake valve control solenoid, any necessary wiring replacements, and diagnostic testing. It's important to note that labor rates can vary based on the location, vehicle make and model, and engine type, so it's advisable to consult with a local auto repair shop for a more accurate estimate.
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