P0067 Fault Code

P0067 OBD-II Trouble Code Short Description

Air Assisted Injector Control Circuit High

What does trouble code P0067 mean?

The P0067 fault code on cars refers to the Air Assisted Injector Control Circuit High. This indicates that there is a high voltage reading detected in the circuit that controls the air assisted injector.

The air assisted injector is a component in the engine that helps deliver additional air into the combustion chamber during cold starts or heavy load conditions. It works in conjunction with the fuel injectors to optimize the fuel mixture for efficient combustion.

When the P0067 code is triggered, it usually means that there is a problem with the wiring, connectors, or the air assisted injector control solenoid itself. This can result in a higher voltage than normal being detected in the circuit.

To diagnose and fix the issue, the following steps may be taken:

  1. Visual inspection: Check the wiring and connectors around the air assisted injector control circuit for any obvious damage or loose connections.

  2. Test the circuit: Use a multimeter to measure the voltage in the circuit. If the voltage reading is significantly higher than the specified range, it indicates an issue with the circuit.

  3. Check the air assisted injector control solenoid: Inspect the solenoid for any signs of damage or blockage. If necessary, clean or replace the solenoid.

  4. Repair or replace faulty components: Based on the inspection and testing, repair or replace any damaged wiring, connectors, or the air assisted injector control solenoid.

It's important to address the P0067 code promptly as it can affect the performance and fuel efficiency of the vehicle. If you are not familiar with car repairs, it is recommended to seek assistance from a qualified mechanic or automotive technician to diagnose and fix the issue accurately.


What are the symptoms of the P0067 code?

The P0067 fault code indicates a high voltage issue in the air assisted injector control circuit. Below are some common symptoms associated with this fault code:

  • Check Engine Light (CEL) is illuminated
  • Decreased engine performance and power
  • Poor acceleration and response
  • Rough idling or stalling
  • Engine misfires
  • Increased fuel consumption
  • Possible black smoke coming from the exhaust

It's important to note that these symptoms may vary depending on the make and model of the vehicle. If you are experiencing any of these symptoms, it is recommended to have your vehicle diagnosed and repaired by a qualified mechanic.


What causes the P0067 code?

The P0067 fault code indicates an issue with the air-assisted injector control circuit, specifically a high voltage condition. Some possible causes for this fault code include:

  1. Faulty air-assisted injector: The air-assisted injector itself may be malfunctioning, sending a high voltage signal to the control circuit.

  2. Open or shorted wiring: A wiring issue, such as an open or short circuit, can disrupt the proper functioning of the control circuit and lead to high voltage readings.

  3. Faulty powertrain control module (PCM): The PCM, which controls various engine functions, including the air-assisted injector, may be faulty and sending incorrect voltage signals.

  4. Poor electrical connection: Loose or corroded electrical connections between the air-assisted injector and the control circuit can result in a high voltage condition.

It is recommended to diagnose the specific cause of the fault code by using a professional diagnostic tool or seeking assistance from a qualified mechanic.

Possible Solutions

How to fix P0067?

The P0067 fault code refers to the Air Assisted Injector Control Circuit High. Here are some steps to fix this issue:

  1. Check the wiring: Inspect the wiring harness and connectors related to the air assisted injector control circuit. Look for any signs of damage, loose connections, or corrosion. Repair or replace any faulty wiring as necessary.

  2. Test the air assisted injector: Use a multimeter to check the resistance of the air assisted injector. Compare the reading to the manufacturer's specifications. If the resistance is out of range, replace the injector.

  3. Check the power supply: Measure the voltage at the air assisted injector connector while the engine is running. It should be within the specified range. If the voltage is too high, there may be a problem with the power supply. This may require further inspection and testing of the wiring and sensors.

  4. Inspect the air intake system: Check for any restrictions or blockages in the air intake system. A clogged or dirty air filter, intake manifold, or throttle body can affect the air assisted injector operation. Clean or replace any components as necessary.

  5. Clear the fault code: After performing the necessary repairs, clear the fault code using an OBD-II scanner or diagnostic tool. This will reset the vehicle's computer and allow you to monitor if the issue has been resolved.

Note: If you are not comfortable with performing these steps on your own, it is recommended to consult a qualified mechanic or automotive technician for assistance.