P0067

Air Assisted Injector Control Circuit High

Q: Is it safe to drive with P0067?

Yes, generally. The air-assist system mainly improves cold-start and idle, so you may feel a rough cold idle but the car remains drivable.

Q: Can I just clear P0067?

It will return while the circuit reads high. This is an electrical fault, so repair the wiring or valve before clearing.

Fuel & air metering Generic OBD-II High

What it means

P0067 means the ECM sees higher-than-expected voltage on the control circuit for the air-assisted injector system — a setup that adds a metered stream of air to the injectors to improve fuel atomization, mainly during cold starts and idle. A fault here tends to show up as a rough cold idle or occasional misfire rather than a no-start. The cause is usually an open or short in the control wiring, or the air-assist valve itself.

High

Can I keep driving? Usually yes — this circuit mainly affects cold-start and idle quality, so expect a rough cold idle rather than a breakdown; repair to clear the light.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Rough idle, especially when cold
Occasional misfire or hesitation
Slightly reduced fuel economy

Common causes

Most likely first

Open or short (high voltage) in the air-assisted injector control circuit (most common)Likely
Corroded or loose connector at the air-assist valveCommon
Faulty air-assisted injector control valveCommon
Failed ECM (rare)Less often

How to diagnose & fix

Work through it in order

Inspect the air-assist control connector and wiring for opens, shorts, or corrosion.
Check the control-circuit voltage and component resistance against spec.
Verify power and ground to the circuit.
Replace the air-assisted injector control valve if it fails testing.
If the circuit and valve are good, suspect the ECM. Clear and retest.

FAQ

Quick answers

Is it safe to drive with P0067?+

Yes, generally. The air-assist system mainly improves cold-start and idle, so you may feel a rough cold idle but the car remains drivable.

Can I just clear P0067?+

It will return while the circuit reads high. This is an electrical fault, so repair the wiring or valve before clearing.

Read & clear P0067 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX