• Check Engine Light is on
• Reduced engine performance
• Increased fuel consumption
• Faulty intake valve control solenoid
• Open or shorted wiring in the intake valve control circuit
• Faulty ECM
ECM: Engine Control Module, the computer that controls engine functions.
Solenoid: An electromechanical device used to control a valve.
• P3488
• P3490
Cylinder 12 Deactivation/Intake Valve Control Circuit/Open
This code means that the computer in your car has found a problem with the system that turns off one of the engine's cylinders (number 12) to save fuel. It's like a switch that isn't working right.
The P3489 code indicates an issue with the circuit that controls the deactivation of cylinder 12's intake valve. This is part of a system designed to improve fuel efficiency by deactivating certain cylinders under light load conditions.
The P3489 code is triggered when the Engine Control Module (ECM) detects an open circuit or malfunction in the cylinder deactivation system for cylinder 12. This system is responsible for controlling the intake valve operation to deactivate the cylinder when needed, typically to enhance fuel economy.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for the intake valve control solenoid.
• Test the intake valve control solenoid for proper operation.
• Replace faulty intake valve control solenoid.
• Repair or replace damaged wiring or connectors.
• Replace or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Dodge Ram 1500
• Jeep Grand Cherokee
• Chrysler 300
• Regular maintenance and inspection of engine components.
• Ensure proper oil levels and quality.
• Avoid heavy loads that may stress the engine.
Engine Performance
• Address the issue promptly to avoid further engine damage.
• Consult a professional mechanic if unsure about repairs.
Check with your vehicle manufacturer for warranty coverage on engine components.
Cylinder deactivation systems have been used to improve fuel efficiency, but they can sometimes lead to issues with solenoids and wiring.
Moderate – While not immediately dangerous, it can lead to decreased fuel efficiency and engine performance.
Driving with a malfunctioning engine can lead to increased emissions and potential engine damage. Address issues promptly.
• Engine at operating temperature
• Vehicle at idle or light load
The intake valve control solenoid is typically located near the cylinder head of the engine.
Q: Can I drive with a P3489 code?
A: It's not recommended to drive for extended periods with this code as it can lead to reduced fuel efficiency and engine performance.
Q: What causes cylinder deactivation issues?
A: Common causes include faulty solenoids, wiring issues, or ECM malfunctions.
