P0306 on Nissan: How to Diagnose & Fix
Cylinder 6 Misfire Detected
1 Nissan model · 1 documented issue · $150-$600 repair
P0306 on Nissan by model: symptoms, diagnosis and fix
The VQ35DE engine in the 6th and 7th generation Maxima is prone to ignition coil failure. Coils typically fail one at a time, causing misfires on the affected cylinder. The rear bank (cylinders 1, 3, 5) coils fail more frequently due to heat soak from the firewall proximity. Coil failure is especially common after 60,000-80,000 miles and is one of the most reported Maxima issues.
Common Symptoms
- Engine misfire and rough idle
- Check engine light flashing
- Loss of power and hesitation
- Rough acceleration
- Increased fuel consumption
How to Fix
Replace failed ignition coil(s). It is recommended to replace all 6 coils at the same time along with spark plugs to prevent repeat failures. OEM Nissan coils cost $40-60 each; quality aftermarket (Hitachi, Denso) $25-40 each. Total parts for all 6: $150-360. Labor: $150-300 (rear bank is harder to access). DIY-friendly on front bank.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Nissan 2004-2008 ignition coil 22448-8J11C
Use only 2004-2008 Maxima and confirm VIN/supersession; sold individually.
- Genuine Nissan 2009-2014 ignition coil 22448-JA11C
Use only 2009-2014 Maxima and confirm VIN/supersession; sold individually.
- Genuine Nissan spark plug 22401-5M014 / NGK PLFR4A-11
Confirm VIN, production date, heat range and required quantity; do not substitute across every 2004-2008 car by year alone.
- Genuine Nissan spark plug 22401-ZE01B / NGK PLFR5A-11
Confirm VIN, production date, heat range and unusual package quantity before ordering; engine requires six plugs, not ten.
- Genuine Nissan 2009-2014 spark plug 22401-EW61C / NGK PLFR4A-11
Use only after confirming 2009-2014 Maxima, VIN, installed plug and seller package quantity; engine requires six.
As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.
P0306 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0306 mean on a Nissan?
P0306 stands for "Cylinder 6 Misfire Detected." This code means the engine computer detected a misfire on cylinder 6 — that cylinder isn't burning its fuel-air mixture properly. The computer senses misfires by watching for tiny variations in crankshaft speed each time a cylinder should fire, and when cylinder 6 repeatedly fails to contribute, this code sets. You may feel a shake or stumble, especially at idle or under load, along with reduced power and possibly a flashing check-engine light, which signals a misfire severe enough to damage the catalytic converter. A misfire comes down to a problem with spark, fuel, or compression in that cylinder. On Nissan it is documented across 1 model: Maxima.
What are the most common causes of P0306?
The most common causes of P0306 are: Worn or fouled spark plug on cylinder 6, Failed ignition coil for cylinder 6, Clogged, leaking, or failed fuel injector, Vacuum or intake air leak affecting that cylinder, Low compression (worn rings, burnt valve, head gasket), Damaged plug wire or coil connector, Carbon buildup or worn valvetrain components. The specific cause varies by vehicle.
How much does it cost to fix P0306 on a Nissan?
Published repair estimates on Nissan range from $150 to $600 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0306 on a different make?
View P0306 across all makes →Join 700+ subscribers following Au7o for vehicle insights and updates.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.