how to fix P0302 misfire code on Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to ensure safety.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 2.
• Extract the spark plug using the spark plug socket.
• Inspect the spark plug for wear; replace it if it shows signs of damage (e.g., worn electrodes, oil fouling).
• Install the new spark plug and torque to manufacturer specifications (typically 13-15 lb-ft for Ford).
• Reconnect the ignition coil.

3. Test and Replace Ignition Coil

• Check the resistance of the ignition coil using a multimeter (should be within manufacturer specifications).
• If faulty, remove the ignition coil from cylinder 2 and replace it with a new one.
• Reconnect the wiring harness to the new ignition coil.

4. Inspect and Clean or Replace Fuel Injector

• Remove the fuel injector from cylinder 2 by disconnecting the fuel line and electrical connector.
• Inspect the fuel injector for clogs or leaks; clean with a fuel injector cleaner or replace if necessary.
• Reinstall the fuel injector and reconnect the electrical connector and fuel line.

5. Perform Compression Test (if necessary)

• Tools Required: Compression tester
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading. Compare against manufacturer specifications.
• If compression is low, further engine diagnostics may be required.