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Engine-Codes – Generic – P3412

P3412 Code - Cylinder 2 Deactivation/Intake Valve Control Circuit High

Quick Answer

The P3412 diagnostic trouble code (DTC) indicates an issue with the Cylinder 2 Deactivation/Intake Valve Control Circuit in the vehicle's engine. Common causes include Faulty intake valve control solenoid, Wiring issues or electrical shorts in the circuit, Engine oil sludge or debris blocking the intake valve. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P3412 indicates Cylinder 2 Deactivation/Intake Valve Control Circuit High.
Common causes
Common causes include Faulty intake valve control solenoid, Wiring issues or electrical shorts in the circuit, Engine oil sludge or debris blocking the intake valve.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code P3412 Description

The P3412 diagnostic trouble code (DTC) indicates an issue with the Cylinder 2 Deactivation/Intake Valve Control Circuit in the vehicle's engine. This code typically relates to a fault in the circuit that controls the deactivation of the intake valve in cylinder 2. When the intake valve is not functioning properly, it can lead to decreased engine performance, reduced fuel efficiency, and potential damage to other components in the engine system. The deactivation of the intake valve is crucial for the engine's operation, as it controls the air intake into the combustion chamber.

OBDII Code P3412 - Cylinder 2 Deactivation/Intake Valve Control Circuit High
P3412 Code - Cylinder 2 Deactivation/Intake Valve Control Circuit High

Common Causes of P3412

  1. Faulty intake valve control solenoid
  2. Wiring issues or electrical shorts in the circuit
  3. Engine oil sludge or debris blocking the intake valve
  4. Mechanical failure in the intake valve system
  5. ECM (Engine Control Module) malfunction

Symptoms of P3412

  1. Reduced engine power or acceleration
  2. Rough idling or stalling
  3. Engine misfires or hesitation
  4. Decreased fuel efficiency
  5. Illumination of the check engine light

How to Fix P3412

  1. Start by conducting a thorough inspection of the intake valve control circuit to identify any visible damage or loose connections.
  2. Test the intake valve control solenoid for proper operation using a multimeter.
  3. Clean the intake valve and surrounding components to ensure there is no obstruction causing the issue.
  4. Replace any faulty components such as the solenoid, wiring harness, or ECM if necessary.
  5. Clear the DTC and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P3412

The typical repair costs for addressing a Cylinder 2 Deactivation/Intake Valve Control Circuit High code can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor in your area. Keep in mind that diagnostic time and labor rates can vary, so it is recommended to obtain a quote from a reputable auto repair shop before proceeding with the repair.

When is the Code Detected?

The control module detects that the actual measured values from the MAF sensor, MAP sensor, and TP sensor, is not within the range of the calculated values for cylinder deactivation mode

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Code P3412 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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