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.
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.
Related codes
Often seen with P0264
Read & clear P0264 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX