P0303 FORD - Cylinder 3 Misfire Detected

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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P0303 FORD Possible Causes

  • Faulty spark plug 3
  • Clogged or faulty fuel injector 3
  • Faulty ignition coil 3
  • Fuel injector 3 harness is open or shorted
  • Fuel injector 3 circuit poor electrical connection
  • Ignition coil 3 harness is open or shorted
  • Ignition coil 3 circuit poor electrical connection
  • Insufficient cylinder 3 compression
  • Incorrect fuel pressure
  • Intake air leak

First diagnose P0303 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 terminals.

P0303 FORD Tech Notes

The P0303 code means that the cylinder 3 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 3. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes"

Cost of diagnosing the P0303 FORD code

    Labor: 1.0

    The cost of diagnosing the P0303 FORD code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

When is the P0303 FORD code detected?

Engine Cylinder 3 is Misfiring.

P0303 FORD Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Lack/loss of power
  • Hard start
  • Engine hesitation

P0303 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.
OBDII Code P0303 Ford - Cylinder 3 Misfire Detected - AutoCodes.com

P0303 FORD More Information

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P0303 FORD Comments

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