P0274 — Cylinder 5 Injector Circuit Low
Drive with caution — fix soon.
What P0274 means
This code means the computer detected an abnormally low voltage in the circuit that controls cylinder 5's fuel injector. It usually points to a short to ground, a wiring or connector fault, or a failing injector. It's commonly fixable by repairing the circuit or replacing the injector, without major engine work.
Common symptoms
- Check engine light is on
- Rough idle or engine shaking
- Engine misfire or hesitation
- Loss of power during acceleration
- Increased fuel consumption
Common causes
- Short to ground in the cylinder 5 injector wiring
- Corroded or loose injector connector
- Failed fuel injector on cylinder 5
- Damaged or chafed injector harness
- Faulty engine control module (ECM) driver
Typical repair cost
$120 – $450
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0274 code?
For short trips, usually yes, but you shouldn't rely on it. The affected cylinder may not fire properly, causing rough running and lost power. Have it checked soon to avoid converter or engine damage.
How much does it cost to fix a P0274 code?
Repairs typically range from about $120 to $450. A wiring or connector repair is on the cheaper end, while replacing the injector and diagnostic labor cost more.
Is a P0274 code serious?
It's a moderate concern. The engine usually still runs, but a misfiring cylinder hurts performance and fuel economy. It's best to address it before it gets worse.
What does a low injector circuit reading mean on cylinder 5?
It means the computer sees too little voltage in the injector control circuit, often from a short to ground or a faulty injector. The injector may not be opening properly, so that cylinder doesn't get the right amount of fuel.