Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with a part of the car's engine that helps save fuel by turning off one of the cylinders. It's like one of the switches that controls a light bulb isn't working right.
The code indicates a low voltage condition in the control circuit for the deactivation of the intake valve on cylinder 4. This can affect the engine's ability to deactivate the cylinder properly.
P3427 is triggered when the Powertrain Control Module (PCM) detects a low voltage condition in the circuit responsible for controlling the deactivation of the intake valve for cylinder 4. This can affect the engine's cylinder deactivation system, which is designed to improve fuel efficiency by shutting down some cylinders when full power is not needed.
• Check Engine Light illuminated
• Reduced engine performance
• Increased fuel consumption
• Faulty intake valve control solenoid
• Wiring issues or poor connections in the circuit
• Failed PCM or related software issues
PCM: Powertrain Control Module
Solenoid: A device that converts electrical energy into mechanical movement
• Scan the vehicle for additional codes and note them.
• Inspect the wiring and connections for the intake valve control solenoid.
• Test the intake valve control solenoid for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty intake valve control solenoid.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Silverado
• GMC Sierra
• Cadillac Escalade
• Regularly inspect and maintain engine wiring.
• Keep the engine control system software updated.
• Perform routine engine diagnostics.
Engine Performance
• Avoid heavy acceleration until the issue is resolved.
• Have the vehicle inspected by a professional mechanic.
• Monitor fuel consumption for any unusual increases.
Check with the vehicle manufacturer for warranty coverage on engine control components.
Cylinder deactivation codes like P3427 have become more common with the advent of fuel-saving technologies in modern engines.
Moderate – While not immediately critical, it should be addressed to avoid long-term engine performance issues.
Driving with a malfunctioning engine control system may lead to increased emissions and may not comply with local environmental regulations.
• Engine at operating temperature
• Vehicle at idle or under light load
The intake valve control solenoid for cylinder 4 is typically located on or near the engine, close to the cylinder head.
Q: Can I drive with a P3427 code?
A: It's possible to drive short distances, but it's best to have the issue checked to prevent further damage.
Q: Will fixing this code improve my fuel economy?
A: Yes, resolving this issue can help restore proper cylinder deactivation, potentially improving fuel efficiency.
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