P0274

Cylinder 5 Injector A Circuit High

Q: Is it safe to drive with P0274?

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

Q: Can I just clear P0274?

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

Fuel injector circuit Generic OBD-II High

What it means

P0274 means the ECM detected a high-voltage condition — typically an open circuit or short-to-voltage — in the electrical circuit that fires cylinder 5's fuel injector. When that injector can't pulse correctly, cylinder 5 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 5 injector causes a misfire that can overheat and damage the catalytic converter.

Real-world scan data

Seen in

122

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P0274 scans

P0205in 82.0% of scans

P0277in 81.2% of scans

P0401in 79.5% 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 5 is misfiring)
Rough idle and engine shake
Misfire, hesitation, or stumble from a weak/dead cylinder 5
Reduced power and higher fuel consumption

Common causes

Most likely first

Open circuit or short-to-voltage (high signal) in the cylinder 5 injector wiringLikely
Damaged, corroded, or loose connector at the cylinder 5 injectorCommon
Failed injector coil/winding on cylinder 5Common
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 5.
Inspect the cylinder 5 injector connector and wiring for opens, a short to voltage, 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 P0274?+

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 P0274?+

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

Read & clear P0274 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