P0305 on a Nissan: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

If the check engine light is flashing, stop driving — a severe misfire can damage the catalytic converter. A steady light is usually safe for a short drive to a shop.

What P0305 means on a Nissan

On a Nissan, P0305 means the engine computer detected a misfire on cylinder 5. That cylinder is not burning fuel properly, which wastes gas and can damage the catalytic converter if left alone. Because the code points to one cylinder, the cause is usually its ignition coil, spark plug, or injector.

Is P0305 common on Nissans?

P0305 appears on Nissan V6 and V8 models like the Altima, Maxima, Murano, and Titan. Failing ignition coils are a common cause on Nissan V6 engines, and worn spark plugs are another usual trigger. Clogged injectors happen at higher mileage.

Commonly reported on: Altima, Maxima, Murano, Titan.

Symptoms

Check engine light on (flashing if severe)
Rough idle or shaking
Loss of power or hesitation
Poor fuel economy

Common causes

most common: Failing ignition coil on cylinder 5
common: Worn or fouled spark plug on cylinder 5
less common: Clogged or leaking fuel injector
less common: Wiring or connector issue at the coil
less common: Low compression from engine wear

How to fix it

Fix	DIY?	Typical cost
Replace the ignition coil on cylinder 5	Yes	$80–250
Replace the spark plug on cylinder 5 (or all plugs)	Yes	$40–150
Replace or clean the cylinder 5 injector	Mechanic	$200–500
Check coil connectors and wiring	Yes	$10–50