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Home/Cars/Ford/Explorer/Fifth Generation (2011-2019)/how to fix P0300 code in Ford Explorer Fifth Generation (2011-2019)

how to fix P0300 code in Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Severity: highDifficulty: mediumError Code: P03002-4 hours
3 min read
551 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0300 engine misfire in Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0300
Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical components.
  • ⚠Allow the engine to cool before opening the fuel system to prevent burns.

Symptoms

  • •Check engine light illuminated
  • •Rough idle
  • •Loss of power during acceleration
  • •Increased fuel consumption
  • •Engine stalling or hesitation
  • •Unusual engine noises (popping or backfiring)

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm P0300 and check for any related codes.
  2. 2Inspect spark plugs for wear and carbon buildup.
  3. 3Check ignition coils for faults or damage.
  4. 4Test fuel pressure using a fuel pressure gauge to ensure it meets specification.
  5. 5Inspect vacuum hoses for leaks or cracks that could affect air intake.
  6. 6Conduct a compression test on each cylinder to identify any mechanical issues.

Solution

Solution

1. Preparation

  • Gather tools and parts required for the repair.
  • Disconnect the negative battery terminal to prevent electrical shorts.
  • Allow the engine to cool before starting work.

2. Replace Spark Plugs

  • Remove the ignition coil cover (if applicable) using a socket set.
  • Disconnect the electrical connector from each ignition coil.
  • Remove the ignition coils using a ratchet and socket.
  • Unscrew and remove the old spark plugs using a spark plug socket.
  • Install new spark plugs, ensuring they are gapped according to manufacturer specifications (usually around 0.054 inches).
  • Reinstall the ignition coils and reconnect the electrical connectors.

3. Inspect and Replace Ignition Coils (if necessary)

  • If any ignition coils were found to be faulty during diagnostics, replace them.
  • Remove the faulty ignition coil, and install the new coil, tightening to manufacturer specifications (usually around 10-15 lb-ft).
  • Reconnect the electrical connectors.

4. Check and Replace Fuel Injectors (if necessary)

  • If fuel pressure was low, check the fuel injectors.
  • Remove the fuel rail after relieving fuel pressure by disconnecting the fuel pump relay and starting the engine until it stalls.
  • Replace any faulty fuel injectors with new ones, ensuring proper seating and connection.

5. Inspect Vacuum Hoses and Gaskets

  • Visually inspect all vacuum hoses connected to the intake manifold.
  • Replace any damaged or cracked hoses.
  • Check intake manifold gaskets for leaks and replace if necessary.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Socket set
  • Spark plug socket
  • Ratchet and extension
  • Fuel pressure gauge
  • Torque wrench

Parts Required

  • Spark plugs
  • Ignition coils
  • Fuel injectors (if necessary)
  • Vacuum hoses (if necessary)

Additional Information

Error CodeP0300
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

6 items

Parts

4 items

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