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Engine-Codes – Generic – P3443

P3443 Code - Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage

Quick Answer

The P3443 code indicates that there is a low voltage condition in the control circuit of the cylinder 6 deactivation solenoid valve. Common causes include Wiring issues in the control circuit, Faulty cylinder 6 deactivation solenoid valve, Malfunctioning engine control module (ECM). 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
P3443 indicates Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage.
Common causes
Common causes include Wiring issues in the control circuit, Faulty cylinder 6 deactivation solenoid valve, Malfunctioning engine control module (ECM).
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 Sep 12, 2024
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Code P3443 Description

The P3443 code indicates that there is a low voltage condition in the control circuit of the cylinder 6 deactivation solenoid valve. In modern vehicles, cylinder deactivation systems are used to improve fuel efficiency by shutting down certain cylinders when they are not needed, such as during cruising or light load conditions. The solenoid valve controls the flow of oil to deactivate the cylinders.

OBDII Code P3443 - Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage
P3443 Code - Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage

Common Causes of P3443

  1. Wiring issues in the control circuit
  2. Faulty cylinder 6 deactivation solenoid valve
  3. Malfunctioning engine control module (ECM)
  4. Poor electrical connections
  5. Corrosion or damage to the wiring harness

Symptoms of P3443

  1. Decreased fuel efficiency
  2. Engine misfires
  3. Loss of power or acceleration
  4. Illuminated check engine light
  5. Rough idling

How to Fix P3443

  1. Use a scan tool to diagnose the specific cause of the low voltage in the cylinder 6 deactivation solenoid valve control circuit.
  2. Inspect the wiring harness for any damage, corrosion, or loose connections. Repair or replace as needed.
  3. Test the cylinder 6 deactivation solenoid valve for proper operation and replace if faulty.
  4. Check the engine control module (ECM) for any malfunctions and reprogram or replace if necessary.
  5. Clear the fault codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P3443

The cost of repairing a P3443 code can vary depending on the specific cause of the issue. Typically, the cost of parts such as a new solenoid valve or ECM can range from $100 to $500. Labor costs at auto repair shops can range from $80 to $150 per hour. The total repair cost for this issue could range from $200 to $800, depending on the extent of the repairs needed. It's recommended to get a detailed estimate from a local auto repair shop to determine the exact cost for your vehicle.

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Code P3443 Information for Specific Makes

  • P3443 Buick — Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage
  • P3443 Cadillac — Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage
  • P3443 Chevrolet — Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage
  • P3443 Chrysler — Cylinder 6 Deactivation Control Circuit Low
  • P3443 Dodge — Cylinder 6 Deactivation Control Circuit Low
  • P3443 GMC — Cylinder 6 Deactivation Solenoid Valve Control Circuit Low Voltage
  • P3443 Jeep — Cylinder 6 Deactivation Control Circuit Low
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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