P0067 Code - Air Assisted Injector Control Circuit High

What Does Code p0067 Mean?

The P0067 code means that the powertrain control module (PCM) is detecting a higher voltage from the air assisted injector system circuit than was specified by the manufacturer. A range of acceptable voltage for this system is programmed into the powertrain control module and once the voltage goes outside of this threshold, the Check Engine Light will be illuminated.

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What are the common causes of P0067 ?

Depending on year, make, and model, DTC P0067 may have number of causes. Here are some of the most common.

• Faulty Valve – Air-assist problems are usually caused by mechanical valve faults. There are separate DTCs for open- and short-circuits, so diagnose these first, if present. If not present, suspect the valve sticking open or closed.
• Vacuum Leaks – The air-assist fuel injection system is constantly under engine vacuum, just like the intake manifold. Disconnected or cracked vacuum lines or an intake gasket leak could cause problems with the air-assist system.

What repairs can fix the P0067 code?

• Repairs that can fix the P0067 code would include:
• Replacing one or more fuel injectors
• Repairing or replacing wiring that is associated with the fuel injection system
• Replacing the powertrain control module
• Replacing the air assisted injector valve

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