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Engine-Codes – Generic – P0067

P0067 Code - Air Assisted Injector Control Circuit High

Quick Answer

The P0067 diagnostic trouble code (DTC) refers to an issue with the Air Assisted Injector Control Circuit being too high. Common causes include Faulty wiring harness, Loose or corroded connectors, Malfunctioning air assisted injector solenoid. 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
P0067 indicates Air Assisted Injector Control Circuit High.
Common causes
Common causes include Faulty wiring harness, Loose or corroded connectors, Malfunctioning air assisted injector solenoid.
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 11, 2024
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Code P0067 Description

The P0067 diagnostic trouble code (DTC) refers to an issue with the Air Assisted Injector Control Circuit being too high. This code typically indicates a problem with the circuit that controls the air assisted injector system in the vehicle. The air assisted injector system is responsible for injecting additional air into the engine to improve combustion efficiency and reduce emissions. When the control circuit is reading too high, it means that there is an electrical fault or malfunction in the system that is causing it to operate outside of normal parameters.

OBDII Code P0067 - Air Assisted Injector Control Circuit High
P0067 Code - Air Assisted Injector Control Circuit High

Common Causes of P0067

  1. Faulty wiring harness
  2. Loose or corroded connectors
  3. Malfunctioning air assisted injector solenoid
  4. Issue with the engine control module (ECM)
  5. Electrical short or open circuit in the control circuit

Symptoms of P0067

  1. Decreased engine performance
  2. Reduced fuel efficiency
  3. Rough idling or stalling
  4. Increased emissions
  5. Check Engine Light illuminated on the dashboard

How to Fix P0067

  1. Begin by conducting a visual inspection of the wiring harness and connectors to check for any visible damage or corrosion. Repair or replace any damaged components.
  2. Test the air assisted injector solenoid using a multimeter to determine if it is functioning properly. Replace if necessary.
  3. Use a scan tool to check for any trouble codes stored in the ECM related to the air assisted injector system. Clear any codes and retest the system.
  4. Check the voltage and resistance in the control circuit to ensure that it is within the manufacturer's specifications. Repair any issues found.
  5. After completing the repairs, clear the trouble code and test drive the vehicle to ensure that the issue has been resolved.

Cost to Fix P0067

The cost of repairing a P0067 code can vary depending on the specific cause of the issue and the labor rates at the auto repair shop. In general, the cost of parts for this repair can range from $50 to $200, while the labor cost can be anywhere from $100 to $300. Overall, the total cost of repairing a high air assisted injector control circuit can be between $150 and $500. It is important to keep in mind that these estimates are rough averages and actual costs may vary based on the factors mentioned earlier. It is recommended to consult with a qualified mechanic for a more accurate cost estimate based on your specific vehicle.

What does this mean?

Tech Notes for P0067

The fault could cause the engine to idle rough and possibly stall. The Air Assist Injector Solenoid Valve is supplied power from the main relay and controlled by the Engine Control Module. The Air Assist Injector Solenoid Valve can be tested by manually applying voltage and ground in order to actuate it. Once the valve is open, the air passages within the valve and system can be checked for obstructions. The Air Assist Injector Solenoid Valve can also be actuated by connecting the green test mode connector located under the instrument panel (On driver' s side, the connector is normally unplugged). Once connected, the Air Assist Injector Solenoid Valve will be turned on and off with the key placed in the on, engine off position. It will continue to turn on and off until the green test mode connector is disconnected.

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Code P0067 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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