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Home/Cars/Ford/F-150/13th Generation (2015-2020)/how to fix P0300 code on Ford F-150 13th Generation (2015-2020)

how to fix P0300 code on Ford F-150 13th Generation (2015-2020)

Ford F-150 13th Generation (2015-2020)

Error Codes
Severity: highDifficulty: mediumError Code: P03002-4 hours
4 min read
635 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 F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0300
Affected Component
Engine
Estimated Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical components.
  • ⚠Allow the engine to cool before performing any repairs.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or engine shaking
  • •Decreased acceleration and power
  • •Increased fuel consumption
  • •Engine stalling or hesitation
  • •Unusual exhaust emissions

Diagnostic Steps

  1. 1Scan the vehicle's computer using an OBD-II scanner to confirm the P0300 code and check for any additional codes.
  2. 2Inspect the spark plugs for wear or damage and check their gap.
  3. 3Examine ignition coils for cracks, corrosion, or any signs of malfunction.
  4. 4Inspect fuel injectors to ensure they are delivering the correct amount of fuel.
  5. 5Check for vacuum leaks in hoses and intake manifold.
  6. 6Test fuel pressure using a fuel pressure gauge to ensure proper fuel delivery.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Ensure the vehicle is parked on a flat surface, and the engine is cool.
  • Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plugs

  • Remove the engine cover (if applicable) using a socket set.
  • Using a spark plug socket, carefully remove each spark plug.
  • Inspect the old spark plugs for wear; if they are worn or damaged, replace them with new ones.
  • Apply anti-seize compound on the threads of the new spark plugs.
  • Torque the new spark plugs to the manufacturer’s specification (usually around 13-15 lb-ft).
  • Reinstall the engine cover.

3. Inspect and Replace Ignition Coils

  • Locate the ignition coils above each spark plug.
  • Disconnect the electrical connectors from the ignition coils.
  • Remove the retaining bolts using a socket set and lift out the coils.
  • Inspect for any cracks or corrosion; replace any defective coils with new ones.
  • Reinstall the ignition coils and reconnect the electrical connectors.

4. Check and Clean Fuel Injectors

  • If the injectors are dirty or clogged, use a fuel injector cleaning kit to clean them.
  • Disconnect the fuel lines from the injectors and remove them from the engine.
  • Clean the injectors per the cleaning kit instructions and reinstall them.

5. Inspect and Repair Vacuum Leaks

  • Visually inspect all vacuum hoses for cracks or disconnections.
  • Use a smoke machine or carburetor cleaner to identify leaks; repair or replace any faulty hoses.

6. Test Fuel Pressure

  • Connect a fuel pressure gauge to the fuel rail’s Schrader valve.
  • Turn the ignition key to the ON position (without starting) to check the pressure.
  • Ensure the pressure meets the manufacturer's specifications (usually around 30-50 psi for the F-150).
  • If the pressure is low, inspect the fuel pump and filter for issues.

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
  • •Torque wrench
  • •Spark plug socket
  • •Fuel pressure gauge
  • •Fuel injector cleaning kit

Parts Required

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

Additional Information

Error Code
P0300
Affected Component
Engine
Estimated Time
2-4 hours
Difficulty
medium
Severity
high
Tools Required
6 items
Parts Required
4 items

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