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Home/Cars/Ford/F-150/12th Generation (2009-2014)/how to fix P0302 code in Ford F-150 12th Generation (2009-2014)

how to fix P0302 code in Ford F-150 12th Generation (2009-2014)

Ford F-150 12th Generation (2009-2014)

Severity: highDifficulty: mediumError Code: P03022-4 hours
4 min read
646 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 P0302 cylinder 2 misfire in Ford F-150 (2009-2014). Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0302
Component
Engine
Repair Time
2-4 hours

Safety Warnings

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

Symptoms

  • •Check engine light illuminated
  • •Rough idle or uneven engine running
  • •Loss of power during acceleration
  • •Decreased fuel economy
  • •Engine stalling or hesitation
  • •Increased exhaust emissions

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm P0302 and check for any additional codes.
  2. 2Inspect the spark plug in cylinder 2 for wear or damage.
  3. 3Check the ignition coil connected to cylinder 2 for proper function.
  4. 4Perform a compression test on cylinder 2 to assess engine health.
  5. 5Inspect fuel injector operation for cylinder 2 using a noid light or by swapping with another cylinder's injector.
  6. 6Check vacuum leaks around the intake manifold and vacuum hoses.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the negative battery terminal.
  • Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

  • Remove the spark plug:
    1. Use a socket wrench to remove the spark plug wire from the spark plug.
    2. Use a spark plug socket to unscrew and remove the spark plug.
  • Inspect the spark plug:
    1. Check for signs of wear, such as cracks, carbon buildup, or excessive gap.
    2. If damaged, replace with a new spark plug (specification: Motorcraft SP-546 or equivalent).
  • Install the new spark plug:
    1. Hand-tighten the new spark plug and then torque to 13 lb-ft (17.5 Nm).
    2. Reattach the spark plug wire securely.

3. Check and Replace Ignition Coil

  • Remove the ignition coil:
    1. Disconnect the electrical connector from the ignition coil.
    2. Remove the mounting bolts securing the ignition coil to the engine.
    3. Gently pull out the ignition coil from the spark plug tube.
  • Inspect the ignition coil:
    1. Check for cracks or signs of arcing.
    2. Replace the ignition coil if damaged (part: Motorcraft DG508 or equivalent).
  • Install the new ignition coil:
    1. Insert the new ignition coil into the spark plug tube.
    2. Reinstall the mounting bolts and torque to manufacturer's specifications (approx. 7 lb-ft).
    3. Reconnect the electrical connector.

4. Inspect Fuel Injector

  • Check injector function:
    1. Use a noid light to confirm that the injector is receiving a signal.
    2. If no signal, check wiring and connectors.
    3. If signal is present but injector is not functioning, replace the fuel injector (part: Motorcraft CM-5113 or equivalent).
  • Install the new injector:
    1. Remove the intake manifold if needed for access.
    2. Install the new fuel injector and ensure it is secured and connected properly.

5. Test Drive

  • Reconnect the negative battery terminal.
  • Start the engine and allow it to reach operating temperature.
  • Test drive the vehicle to ensure the issue is resolved.

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
  • Compression tester
  • Noid light

Parts Required

  • Spark plug (Motorcraft SP-546 or equivalent)
  • Ignition coil (Motorcraft DG508 or equivalent)
  • Fuel injector (Motorcraft CM-5113 or equivalent)

Additional Information

Error CodeP0302
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

5 items

Parts

3 items

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