Engine-Codes - Ford - P0300 FORD

P0300 FORD Code - Random Misfire Detected

- Code Popularity: 173,794 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents

|What are the Possible Causes of the P0300 FORD Code?

  • Faulty spark plug (s)
  • Faulty ignition coil (s)
  • Clogged or faulty fuel injector (s)
  • Intake air leak
  • 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
  • Insufficient cylinders compression
  • Incorrect fuel pressure

|How to Fix the P0300 FORD Code?

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.

|P0300 FORD code 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 commonly caused by multi-cylinder misfiring. If no leak is 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"

2002 Expedition Misfire






User Submitted Video

|What is the cost to diagnose the P0300 FORD code?

Labor: 1.0

The cost to diagnose the P0300 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 P0300 FORD code detected?

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

|What are P0300 FORD code possible symptoms?

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

|What Does the P0300 FORD Code Mean?

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.

Random Misfire Detected

|Need more information with the P0300 FORD code?

Need more information on how to fix the P0300 FORD code?
Get Access to Factory Service Manuals

|Need help with a P0300 FORD code?

Get the p0300 ford code diagnosed by a professional: Find a repair shop in your area