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P0306 Ford

P0306 Ford - Cylinder 6 Misfire Detected

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P0306 Ford Comments |  Add Comment
Possible causes
- 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
Help with Possible causes What does this mean?
Tech notes
The P0306 code means that the cylinder 6 is misfiring or is randomly misfiring. Start by checking for intake leaks an if no leaks are found the next step is to replace the spark plugs on cylinder 6. If the problem persist more tests needs to be done to diagnose problem, see "Possible Causes"
Help with Tech Notes What does this mean?
When is the code detected?
Engine Cylinder 6 is Misfiring.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation
P0306 Ford 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.

FORD Technical Service Bulletins for P0306 code
2003 FORD MUSTANG Engine And Engine Cooling:engine Details
2004 FORD MUSTANG Engine And Engine Cooling:engine Details
2003 FORD MUSTANG 061000 Engine And Engine Cooling:engine Details
2004 FORD MUSTANG 061000 Engine And Engine Cooling:engine Details
2004 FORD RANGER Engine And Engine Cooling:engine Details
2005 FORD RANGER Engine And Engine Cooling:engine Details
2006 FORD RANGER Engine And Engine Cooling:engine Details
2004 FORD RANGER 061000 Engine And Engine Cooling:engine Details
2005 FORD RANGER 061000 Engine And Engine Cooling:engine Details
2006 FORD RANGER 061000 Engine And Engine Cooling:engine Details
More Bulletins Help with Technical Service Bulletins What does this mean?
P0306 Ford Information for specific Ford models
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