• Check Engine Light is on
• Reduced engine performance
• Poor fuel economy
• Faulty cylinder deactivation solenoid
• Open or shorted wiring in the valve control circuit
• Defective PCM
PCM: Powertrain Control Module
Solenoid: An electromechanical device that controls a valve or switch
• P3427
• P3429
Cylinder 4 Deactivation/Intake Valve Control Circuit High
This code means that the computer in your car found a problem with the part that controls how much air goes into cylinder 4 of the engine. It's like when a valve in a pipe gets stuck open and too much water flows through.
The P3428 code indicates that the vehicle's powertrain control module (PCM) has detected a high voltage condition in the cylinder 4 deactivation or intake valve control circuit.
The P3428 code is triggered when the PCM detects a high voltage signal from the cylinder 4 deactivation or intake valve control circuit. This circuit is responsible for controlling the deactivation of cylinder 4, typically in vehicles with variable displacement engines that deactivate cylinders to improve fuel efficiency. A high voltage condition can indicate an electrical fault, such as a short circuit, or a failure in the solenoid or actuator that controls the valve.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage.
• Test the cylinder deactivation solenoid for proper operation.
• Replace the faulty cylinder deactivation solenoid.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance and inspection of engine components.
• Avoiding harsh driving conditions that may stress engine components.
• Ensuring timely oil changes to prevent sludge buildup.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving at high speeds until the issue is resolved.
Check with your vehicle manufacturer; powertrain warranties may cover this repair.
This code is more common in vehicles with cylinder deactivation technology, which became prevalent in the mid-2000s.
Moderate – While the vehicle may still be drivable, it is recommended to address this issue promptly to avoid further engine damage.
Driving with a malfunctioning engine can lead to increased emissions and potential safety risks.
• Engine running
• Vehicle at operating temperature
The cylinder deactivation solenoid is typically located on or near the engine cylinder head.
Q: Can I drive my car with a P3428 code?
A: It's possible to drive short distances, but it's not recommended as it may cause further damage.
Q: How can I prevent a P3428 code?
A: Regular maintenance and avoiding excessive engine load can help prevent this code.
