OBD-II trouble code
P0067: Air Assisted Injector Control Circuit High
Application matters: Confirm the manufacturer’s complete DTC and that this engine has the identified air-assisted injector control system. The generic label does not locate a separate valve, hose, connector or replacement part.
The controller reported an air-assisted injector control circuit-high fault. Identify the installed system and use its actual test sequence before choosing a component.
Quick facts
- System
- Powertrain
- Category
- Fuel Injectors
- Severity
- Medium severity
- Driving guidance
- Depends on symptoms and vehicle guidance
- Repair cost range
- $125 – $183 (check engine light diagnosis, labor example only)
- DIY difficulty
- Shop recommended
A code alone cannot establish whether driving is safe. Stop safely for a red brake or oil-pressure warning, overheating, severe misfire, stalling, or impaired braking or steering, and follow the owner's manual. Restraints faults can reduce crash protection even when the vehicle runs normally.
Part of a family with 3 codes
P0067 is one of 3 codes covering air assisted injector control faults. The identifier must be matched to the exact vehicle. Related codes can share a diagnostic approach, but their circuit, failure condition, and required tests can differ.
Read the full guide for this family →Browse every code in P0001–P00C6, or start from the full code library.
What does P0067 mean?
The controller reported an air-assisted injector control circuit-high fault. P0065 identifies range/performance, P0066 identifies circuit or circuit low, and P0067 identifies circuit high. Keep those results distinct when recording the scan report. None selects a replacement by itself.
Start with the complete manufacturer code, engine and installed-system diagrams. Do not diagnose an assumed external solenoid or hose arrangement from a generic title. The relevant command, electrical feedback and functional response must be identified for the actual design.
High describes the monitor’s electrical result. It does not independently identify an open winding, a short to power, a lost supply or a controller fault. The meaning of a disconnected reading depends on the actual circuit.
Do not apply battery voltage, bridge terminals or disconnect control modules as an improvised test. A click, one resistance reading or one successful command does not verify the complete circuit and air-control function.
Possible causes
- Loose, contaminated or damaged connections in the identified control path
- An open, short or excessive resistance established by the application-specific circuit checks
- An internal control-component fault demonstrated by the permitted tests
- A supply, controller or configuration fault established after the required system checks
Symptoms
- Check engine light or stored P0067
- Possible starting, idle or running complaint, depending on the fitted system
- Relevant companion circuit or mixture/misfire codes
- No obvious symptom at the inspection; this does not establish a completed repair
Diagnostic steps
Save the full scan report, code status, and available freeze-frame data before clearing anything. Confirm the reporting module, any failure-type suffix, and the procedure for the exact vehicle. The steps below are an overview; use manufacturer specifications and safety procedures for testing.
- 1.Save the complete P0067, reporting module, suffix, status, freeze-frame/event information and companion codes before clearing anything.
- 2.Confirm the vehicle, engine, calibration and installed air-assisted injector control hardware using manufacturer information. Match the actual component and connector before ordering parts.
- 3.With the engine off and cool, inspect only safely accessible identified connections and any fitted air lines for visible disconnection, damage or interference from recent work. Do not open a fuel system or use flammable spray as a leak test.
- 4.Have a qualified technician follow the actual circuit and functional checks, including required supplies, controlled paths and command/response data. Use the manufacturer’s test conditions rather than an assumed cold-start or idle window.
- 5.Interpret voltage/current or isolated component measurements using the actual diagram and specifications. Unplugging a component or obtaining a finite resistance is not a complete pass/fail diagnosis.
- 6.Repair the established cause, then complete the specified safe verification and monitor checks. Clearing the code or a later warm idle alone does not prove repair.
Repair cost
$125 – $183 (check engine light diagnosis, labor example only)
USD planning figures, not a vehicle-specific quote. Confirm the diagnosed job and whether the estimate includes diagnosis, parts, labor, programming, calibration, and taxes.
RepairPal national diagnostic-labor estimate, updated September 3, 2026 and checked November 6. Excludes taxes, fees, location differences and repair work. A confirmed component, wiring, hose or control repair requires a separate vehicle-specific quote.
Estimate your repair
Run the numbers for your vehicle
Open the Repair Cost Estimator with check engine light diagnosis preselected. Adjust labor rate and vehicle category to fit your situation.
Related repairs
These links are planning examples; the code does not confirm that any listed part has failed.
DIY vs shop
A qualified shop is recommended because this can involve vehicle-specific fuel-system testing; any high-pressure work also requires the prescribed pressure-release and handling precautions. Ask the technician what testing confirmed the repair.