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Engine Fault Code P0067

Air Assisted Injector Control Circuit High

Care Engine Code Reader
The Engine Fault Code P0067 refers to an issue with the Air Assisted Injector Control Circuit. This code typically means that there is a problem with the circuit that controls the air-assisted fuel injectors, which help improve fuel atomization for better combustion.

While the basic meaning of P0067 is generally the same across different manufacturers, some specific vehicles may have unique interpretations or additional details. Here are some possible variations depending on the manufacturer:

1. Porsche: In Porsches, this code may indicate a malfunction in the air-assisted fuel injection system, which could affect engine performance and fuel efficiency.

2. Mini: For Mini vehicles, P0067 might relate to issues with the fuel delivery system or the electronic control unit (ECU) that manages the injectors.

3. Mercedes: In Mercedes cars, this code could point to a problem with the air-fuel mixture or the injector control circuit, possibly leading to rough idling or reduced power.

4. Audi: Audi vehicles may interpret this code as a failure in the air-assisted injector system, which can cause poor acceleration and increased emissions.

5. Jaguar: In Jaguars, P0067 might indicate that the engine control module (ECM) has detected a fault in the air-assisted injector, affecting overall engine performance.

6. Land Rover: For Land Rover models, this code can signal issues with the air-assisted fuel injection system, potentially leading to engine misfires or performance issues.

If you encounter this code, it`s a good idea to check the wiring and connections related to the air-assisted injectors. A scan tool can help you read the code and any related codes, which may provide more insight into the issue. Always refer to the specific service manual for your vehicle for more detailed diagnostics and repair procedures.
The Engine Fault Code P0067 indicates a problem with the Air Assisted Injector Control Circuit, specifically that it`s reading a high voltage or signal. This code can be triggered by various issues, and while the basic concept is similar across different manufacturers, the specifics can vary. Here are some common causes for this code:

1. Faulty Air Assisted Injector: The injector itself may be malfunctioning, causing an incorrect signal to be sent to the engine control unit (ECU).

2. Wiring Issues: Damaged or corroded wiring in the control circuit can lead to high resistance or short circuits, triggering the code.

3. Connector Problems: Loose or corroded connectors can also cause poor communication between the injector and the ECU.

4. ECU Malfunction: In some cases, the engine control unit itself may have a fault, leading to incorrect readings from the injector circuit.

5. Vacuum Leaks: If there are leaks in the intake system, it can affect air-fuel mixture, potentially causing the injector to operate incorrectly.

6. Faulty Sensors: Issues with related sensors, such as the Mass Air Flow (MAF) sensor or Manifold Absolute Pressure (MAP) sensor, can cause incorrect data to be sent to the ECU, affecting injector performance.

Manufacturer-Specific Notes:

Porsche: In Porsches, the issue may be more related to the high-performance nature of the engine and its sensitive components. Check for software updates or specific service bulletins.

Mini: Minis may have unique wiring harness issues due to their compact design. Inspect the wiring thoroughly for wear or damage.

Mercedes: Mercedes vehicles might have a more complex ECU setup that can lead to multiple fault codes. It`s important to read all codes present to get a complete picture.

Audi: Audi models often use advanced fuel injection systems. If the P0067 code appears, it`s crucial to check for compatibility with the fuel being used.

Jaguar: Jaguars may have issues related to their premium fuel requirements. Ensure that the correct fuel type is being used, as this can affect injector performance.

Land Rover: Land Rovers often face environmental challenges (like water and mud) that can affect electrical connections. Inspect connectors for moisture and corrosion.


When diagnosing a P0067 code, it`s essential to perform a thorough inspection of the injector, wiring, connectors, and related sensors. If you`re unsure, consulting a professional or using a diagnostic tool specific to the manufacturer can provide more precise information.
The Engine Fault Code P0067 indicates an issue with the Air Assisted Injector Control Circuit, which is typically found in certain vehicles, including some European models. Heres a general approach to diagnosing and fixing this code, along with some manufacturer-specific considerations:

General Steps to Fix P0067:

1. Check for Other Codes: Start by scanning the vehicles computer for any additional trouble codes. This can help pinpoint the issue.

2. Inspect Wiring and Connectors: Look for damaged wires or loose connections in the Air Assisted Injector Circuit. Corrosion or broken connectors can cause high resistance and trigger the code.

3. Test the Air Assisted Injector: Use a multimeter to check the resistance of the injector. Refer to the vehicle`s service manual for the correct specifications. If the injector is out of range, it may need replacement.

4. Check the Power Supply: Ensure that the injector is receiving the correct voltage from the engine control module (ECM). If not, there may be an issue with the ECM or the power supply circuit.

5. Examine the ECM: If everything else checks out, the ECM may be faulty. Testing or reprogramming the ECM might be necessary.

6. Clear the Codes: After repairs, clear the codes and take the vehicle for a test drive to see if the code returns.

Manufacturer-Specific Considerations:

1. Porsche: For Porsche models, ensure that you have the correct software for diagnosing. Some models may require specific adaptations after replacing components.

2. Mini: In Mini vehicles, the air assisted injector may be integrated with other systems. Check for software updates that may address known issues.

3. Mercedes: Mercedes vehicles might have additional sensors that affect the air assisted injector. Check for issues with the MAF (Mass Air Flow) sensor, as it can influence injector performance.

4. Audi: Audi models often have complex wiring harnesses. Pay special attention to any TSBs (Technical Service Bulletins) that may relate to the injector circuit.

5. Jaguar: For Jaguar, ensure that the fuel delivery system is functioning properly. A clogged fuel filter or failing fuel pump can also cause injector issues.

6. Land Rover: In Land Rover vehicles, check for vacuum leaks in the intake system, as these can affect the air assisted injectors and trigger fault codes.

Final Note:
Always refer to the specific service manual for the vehicle you are working on for detailed instructions and specifications. If you`re unsure or the problem persists, consulting a professional mechanic or technician is advisable.
Driving with a P0067 code, which indicates an issue with the Air Assisted Injector Control Circuit, is generally not safe. This code points to a problem in the system that helps control fuel injection, which can lead to poor engine performance, increased emissions, and potential damage if not addressed. Heres a breakdown by manufacturer:

Porsche
– Safety: It is not safe to drive. You may experience misfires or rough idling.
– Get it checked as soon as possible.

Mini
– Safety: Driving is not recommended. It can affect fuel efficiency and engine performance.
– Have it diagnosed immediately to avoid further issues.

Mercedes
– Safety: Its unsafe to drive. The car may go into limp mode, limiting power.
– Seek professional help to prevent engine damage.

Audi
– Safety: Not safe. You could face stalling or reduced power.
– Address the issue quickly to avoid complications.

Jaguar
– Safety: Driving may be risky. You could experience poor acceleration and rough running.
– Have it inspected promptly.

Land Rover
– Safety: It is unsafe to drive. You may experience performance issues and increased emissions.
– Get it diagnosed soon to prevent further damage.

General Advice
In all cases, its best to avoid driving the vehicle until the issue is resolved. Ignoring the code could lead to more significant problems and costly repairs down the line. Always consult a professional mechanic for a proper diagnosis.

OBD Codes Explained

Engine Codes

P is for PowerTrain - Engine and Transmission.

P0 Indicates Generic Powertrain Codes

P0 Codes indicate problems with the powertrain and are common for all vehicles using the OBD-II Standard.

P1 Enhanced Manufacturer Specific Codes

P1 Codes are specific to manufacturers.

Sub-System

The 3rd Digit indicates the Sub-System

1 – Emission Management

2 – Injector Circuit

3 – Ignition

4 – Emission Control

5 – Vehicle Speed and Idle

6 – Computer and Output

7 – Transmission

8 – Transmission

9 – Reserved

0 – Reserved

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