Air Assisted Injector Control Circuit High
The P0067 code indicates that the Powertrain Control Module (PCM) has detected a high voltage condition in the air assisted injector control circuit. This circuit controls the air injection system that assists fuel atomization in the intake manifold. A high voltage reading typically points to a short to power, a faulty injector, or a wiring issue. This can lead to poor fuel economy, rough idle, and increased emissions.
01. Most Common Causes
- Short to power in the air assisted injector control circuit
- Faulty air assisted injector
- Damaged wiring or connector
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or hesitation
- Poor fuel economy
- Increased emissions
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm the code and check for other related codes.
Step 2: Visually inspect the wiring and connectors for damage, corrosion, or shorts.
Step 3: Test the air assisted injector resistance with a multimeter and compare to specs.
Step 4: Check for voltage at the injector connector with key on; if high, trace short to power.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended as it can cause poor engine performance and potential damage to the catalytic converter.
How much does it cost to fix?▼
Typically $50-$150 for diagnosis and repair, but could be higher if the PCM needs replacement.