Engine-Codes - Ford - P0300 2009 FORD FUSION

P0300 2009 FORD FUSION - Random Misfire Detected

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P0300 2009 FORD FUSION Possible Causes

  • Faulty spark plug (s)
  • Low fuel
  • Faulty ignition coil (s)
  • Clogged or faulty fuel injector (s)
  • Intake air leak
  • Exhaust gas recirculation (EGR) system blocked or stuck open
  • Fuel injectors harness is open or shorted
  • Fuel Injectors circuit poor electrical connection
  • Ignition coils harness is open or shorted
  • Ignition coils circuit poor electrical connection
  • Camshaft position sensor
  • Insufficient cylinders compression
  • Incorrect fuel pressure

How is the P0300 2009 FORD FUSION code repair?

Start by checking 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.

Tech Notes

The P0300 code means that a cylinder(s) is misfiring or is randomly misfiring. Start by checking for intake leaks, intake gaskets are common caused of multi-cylinder misfiring. If no leak are found the next step is to replace the spark plugs. If the problem persists more tests needs to be done to diagnose problem, see "Possible Causes"

What is the cost to diagnose the P0300 2009 FORD FUSION code

Labor: 1.0

The cost to diagnose the P0300 2009 FORD FUSION 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.
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When is the code detected?

The random misfire DTC indicates multiple cylinders are misfiring or the powertrain control module (PCM)

Possible Symptoms

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

P0300 2009 FORD FUSION Meaning

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.

More Information

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