P0264

Cylinder 2 Injector A Circuit Low

Fuel injector circuit Generic OBD-II High

What it means

P0264 means the ECM detected a low-voltage condition — usually a short-to-ground or open — in the electrical circuit that fires cylinder 2's fuel injector. When that injector can't pulse correctly, cylinder 2 runs weak or dead, causing a rough-running misfire. It's primarily an electrical fault in the injector wiring, connector, or the injector itself.

High

Can I keep driving? Drivable but not advisable — a dead or weak cylinder 2 injector causes a misfire that can overheat and damage the catalytic converter.

Real-world scan data

Seen in

329

scans in the past year

Found in

0.1%

of scans

0.1%

of scans that found faults

Appears alongside · share of P0264 scans

P0261in 63.5% of scans

P0267in 59.0% of scans

P0270in 49.9% 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 (may flash if cylinder 2 is misfiring)
Rough idle and engine shake
Misfire, hesitation, or stumble from a weak/dead cylinder 2
Reduced power and higher fuel consumption

Common causes

Most likely first

Short-to-ground or open (low signal) in the cylinder 2 injector circuit wiringLikely
Damaged, corroded, or loose connector at the cylinder 2 injectorCommon
Failed injector coil/winding on cylinder 2Common
Faulty injector driver in the engine control module (ECM) — least commonLess often

How to diagnose & fix

Work through it in order

Read freeze-frame data and confirm the fault is isolated to cylinder 2.
Inspect the cylinder 2 injector connector and wiring for a short to ground, corrosion, or damage.
Measure the injector's resistance and compare to the other injectors and to spec.
Swap or replace the injector if out of range; if wiring and injector are good, have the ECM driver checked. Clear and re-test.

FAQ

Quick answers

Is it safe to drive with P0264?+

Not for long. A misfiring cylinder dumps unburned fuel into the exhaust and can quickly damage the catalytic converter, so repair it soon.

Can I just clear P0264?+

It clears, but an injector-circuit fault returns until the wiring, connector, or injector is repaired.

Read & clear P0264 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