P0306 2011 Ford Fusion Code - Cylinder 6 Misfire Detected
Quick Answer
Misfire is defined as a lack of combustion in a cylinder due to the absence of a spark, incorrect fuel metering, low compression, or any other cause. Common causes include Faulty spark plug 6, Clogged or faulty fuel injector 6, Faulty ignition coil 6. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0306 2011 Ford Fusion indicates Cylinder 6 Misfire Detected.
- Common causes
- Common causes include Faulty spark plug 6, Clogged or faulty fuel injector 6, Faulty ignition coil 6.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0306 2011 Ford Fusion Description
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the Crankshaft Position (CKP) sensor signal to vary, the Engine Control Module (ECM) can determine that a misfire is occurring.
The Malfunction Indicator Lamp (MIL) blinks once per second when detecting a misfire severe enough to cause catalyst damage. If the MIL is in a steady state due to a misfire, this indicates the threshold for emissions was exceeded and caused the vehicle to fail an inspection and maintenance tailpipe test.
This Diagnostic Trouble Code (DTC) sets when the misfire detection monitor detects an engine misfire in cylinder 6.
What are the Possible Causes of the DTC P0306 2011 Ford Fusion?
- Faulty spark plug 6
- Clogged or faulty fuel injector 6
- Faulty ignition coil 6
- Fuel injector 6 harness is open or shorted
- Fuel injector 6 circuit poor electrical connection
- Ignition coil 6 harness is open or shorted
- Ignition coil 6 circuit poor electrical connection
- Insufficient cylinder 6 compression
- Incorrect fuel pressure
- Intake air leak
How to Fix the DTC P0306 2011 Ford Fusion?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0306 2011 Ford Fusion code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0306 2011 Ford Fusion Code
1. What does the OBDII code P0306 mean on a 2011 Ford Fusion?
P0306 indicates that the Engine Control Module (ECM) has detected a misfire in cylinder 6 of the engine.
2. What are the symptoms of a P0306 code on a 2011 Ford Fusion?
Symptoms include rough idling, reduced engine performance, poor fuel economy, hesitation during acceleration, and the Check Engine Light turning on.
3. What are the common causes of a P0306 code in a 2011 Ford Fusion?
Common causes include a faulty spark plug, ignition coil failure, clogged fuel injector, vacuum leak, or low cylinder compression in cylinder 6.
4. Can I drive my 2011 Ford Fusion with a P0306 code?
It is not recommended to drive with a P0306 code for an extended period, as it can lead to engine damage or catalytic converter failure.
5. How do I fix a P0306 code on a 2011 Ford Fusion?
Repairs often include replacing the spark plug or ignition coil for cylinder 6, cleaning or replacing the fuel injector, checking for vacuum leaks, or addressing low compression issues.
6. How do I identify cylinder 6 on a 2011 Ford Fusion?
In the 2011 Ford Fusion with a V6 engine, cylinder 6 is typically located on the rear bank, farthest to the passenger side. Refer to the engine’s cylinder layout in the service manual.
7. Can a dirty fuel injector cause a P0306 code?
Yes, a clogged or dirty fuel injector can disrupt the fuel-air mixture, causing a misfire in cylinder 6 and triggering the P0306 code.
8. How much does it cost to repair a P0306 code on a 2011 Ford Fusion?
The cost depends on the specific issue but can range from $100 for a spark plug replacement to $500 or more for more complex repairs like injector or compression issues.
9. Can a vacuum leak cause the P0306 code in my 2011 Ford Fusion?
Yes, a vacuum leak near cylinder 6 can disrupt the air-fuel ratio and lead to a misfire, triggering the P0306 code.
10. Will clearing the P0306 code fix the issue in my 2011 Ford Fusion?
Clearing the code will turn off the Check Engine Light temporarily, but it will not fix the underlying issue causing the misfire. Proper diagnostics and repairs are needed.
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