P0304 FORD Code - Cylinder 4 Misfire Detected
|P0304 FORD code possible causes
- Faulty spark plug 4
- Clogged or faulty fuel injector 4
- Faulty ignition coil 4
- Fuel injector 4 harness is open or shorted
- Fuel injector 4 circuit poor electrical connection
- Ignition coil 4 harness is open or shorted
- Ignition coil 4 circuit poor electrical connection
- Insufficient cylinder 4 compression
- Incorrect fuel pressure
- Intake air leak
|How do I fix the P0304 FORD code?Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
|P0304 FORD code tech notesThe P0304 code means that cylinder 4 is misfiring or is randomly misfiring. Start by checking for intake leaks and if no leaks are found the next step is to replace the spark plugs on cylinder 4. If the problem persists more tests need to be done to diagnose the problem, see "Possible Causes".
There is a Factory Service Bulletin for the 2011 Ford Mustang:
2011 Ford Mustang Factory Service Bulletin OBDII Code P0304
The Factory Service Bulletin recommends reprogramming the Powertrain Control Module (PCM) to resolve the problem.
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|Cost of diagnosing the P0304 FORD code
Labor: 1.0The cost of diagnosing the P0304 FORD code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
|When is the P0304 FORD code detected?Engine Cylinder 4 is Misfiring.
|What are P0304 FORD code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
- Lack/loss of power
- Hard start
- Engine hesitation
|P0304 FORD code descriptionWhen 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.
|Need more information with the P0304 FORD code?Need more information on how to fix the P0304 FORD code? Get Access to Factory Service Manuals
|P0304 FORD code information for specific Ford models
- P0304 2001 FORD EXPLORER ▶
- P0304 1997 FORD F150
- P0304 1998 FORD F150
- P0304 1999 FORD F150
- P0304 2000 FORD F150
- P0304 2001 FORD F150
- P0304 2002 FORD F150
- P0304 2003 FORD F150
- P0304 2006 FORD FUSION 📷
- P0304 2007 FORD FUSION 📷
- P0304 2008 FORD FUSION 📷
- P0304 2009 FORD FUSION 📷
- P0304 2010 FORD FUSION 📷
- P0304 2011 FORD FUSION 📷
- P0304 2012 FORD FUSION 📷
|Need help with a P0304 FORD code?Get the P0304 Ford code diagnosed by a professional: Find a repair shop in your area
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