P0268

Cylinder 3 Injector A Circuit High

Q: Is it safe to drive with P0268?

For short trips, but cylinder 3 may not fire properly. A prolonged misfire dumps raw fuel into the exhaust and can damage the catalytic converter, so repair it soon.

Q: Can I just clear P0268?

It returns as soon as the injector circuit faults again. Fix the injector or wiring rather than clearing the code.

Fuel injectors Generic OBD-II High

What it means

P0268 means the ECM has detected an abnormally high voltage (or an open) in the cylinder 3 fuel-injector control circuit. When that injector can't be driven properly, cylinder 3 misfires — the engine runs rough and loses a little power. The cause is usually electrical: the injector coil, its connector, or the wiring, rather than fuel pressure.

High

Can I keep driving? You can drive short-term, but cylinder 3 may misfire; a sustained misfire wastes fuel and can overheat the catalytic converter, so fix it soon.

Real-world scan data

Seen in

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P0268 scans

P0265in 58.4% of scans

P0262in 57.3% of scans

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 or a cylinder-3 misfire
Reduced power and hesitation
Increased fuel consumption, possible fuel smell
Companion misfire code P0303

Common causes

Most likely first

Open or high-resistance in the cylinder 3 injector control circuitLikely
Failed cylinder 3 injector (open or high-resistance coil)Common
Corroded or loose injector connectorCommon
Damaged wiring or a weak ECM injector driverLess often
ECM fault (rare)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and check for a cylinder-3 misfire code (P0303).
Inspect the cylinder 3 injector connector and wiring for opens or high resistance.
Measure the injector's coil resistance and compare it to specification.
Swap or replace the injector, or repair the wiring.
Clear the code and re-test.

FAQ

Quick answers

Is it safe to drive with P0268?+

For short trips, but cylinder 3 may not fire properly. A prolonged misfire dumps raw fuel into the exhaust and can damage the catalytic converter, so repair it soon.

Can I just clear P0268?+

It returns as soon as the injector circuit faults again. Fix the injector or wiring rather than clearing the code.

Read & clear P0268 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