Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer found a problem with the system that helps turn off one of the engine's cylinders to save fuel. It's like when you turn off a light to save electricity, but the switch isn't working right.
The P3425 code indicates a problem with the deactivation of the intake valve control circuit for cylinder 4. This issue can prevent the cylinder from shutting down properly when the engine is trying to save fuel.
The P3425 code is set when the Powertrain Control Module (PCM) detects an open circuit or fault in the cylinder 4 deactivation solenoid or its associated wiring. This solenoid is responsible for deactivating the intake valve of cylinder 4 during certain driving conditions to improve fuel efficiency.
• Check Engine Light illumination
• Reduced engine performance
• Poor fuel economy
• Faulty cylinder deactivation solenoid
• Open or shorted wiring in the solenoid circuit
• Faulty PCM
PCM: Powertrain Control Module
Solenoid: An electromechanical device used to control a mechanism or system
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for cylinder 4 deactivation solenoid.
• Test the solenoid for proper operation.
• Replace the faulty solenoid.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regular maintenance and inspections
• Ensure proper electrical connections
• Use quality fuel and oil
Engine Performance
• Avoid heavy acceleration until the issue is fixed.
• Get the vehicle checked by a professional mechanic.
Check vehicle warranty for powertrain coverage.
This code is common in vehicles with cylinder deactivation technology, often seen in GM vehicles.
Moderate – It should be addressed soon to avoid potential engine damage and ensure optimal fuel efficiency.
Driving with this code may lead to increased emissions and reduced fuel economy.
• Engine at operating temperature
• Vehicle in fuel-saving mode
The cylinder 4 deactivation solenoid is typically located on or near the engine, often on the cylinder head.
Q: Can I drive with a P3425 code?
A: You can drive with this code, but it's best to get it fixed soon to avoid reduced fuel efficiency and potential engine damage.
Q: How do I reset the P3425 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is resolved, it should not return.
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