Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This error means that the car's computer is having trouble controlling one of the parts that helps turn off a cylinder in the engine to save fuel. It's like one of the switches isn't working right.
The P3443 code indicates that the engine control module (ECM) has detected a low voltage condition in the circuit that controls the deactivation of cylinder 6's intake valve.
The P3443 code is triggered when the ECM detects an abnormal voltage reading in the cylinder deactivation circuit for cylinder 6. This system is part of the vehicle's variable displacement technology, which allows the engine to deactivate certain cylinders under light load conditions to improve fuel efficiency. A 'low' circuit condition usually indicates an issue with the wiring, connectors, or the solenoid responsible for deactivating the intake valve.
• Check Engine Light illumination
• Reduced engine performance
• Poor fuel economy
• Faulty intake valve control solenoid
• Open or shorted wiring in the deactivation circuit
• Poor electrical connection at the solenoid or ECM
ECM: Engine Control Module
Solenoid: A device that converts electrical energy into mechanical movement
• Use an OBD-II scanner to confirm the P3443 code.
• Inspect the wiring and connectors for cylinder 6's deactivation solenoid.
• Test the intake valve control solenoid for proper operation.
• Replace the faulty intake valve control solenoid.
• Repair or replace damaged wiring or connectors.
• Clear the code and test drive the vehicle to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance and inspection of the engine's electrical components
• Ensure proper engine oil levels and quality
• Avoid aggressive driving habits
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you're not comfortable with car repairs.
Check with your vehicle's manufacturer for specific warranty coverage on engine components.
Cylinder deactivation technology has been used in vehicles to improve fuel efficiency by shutting down some cylinders when full power is not needed.
Moderate – It should be addressed soon to avoid potential engine performance issues.
Driving with a malfunctioning engine component can lead to increased emissions and potential safety issues.
• Engine at operating temperature
• Vehicle in a steady state of operation
The intake valve control solenoid for cylinder 6 is typically located on or near the cylinder head of the engine.
Q: Can I drive with a P3443 code?
A: It's possible to drive with this code, but it's not recommended as it can lead to reduced performance and fuel efficiency.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections can help prevent electrical issues that lead to this code.
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