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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter.
• Safety Warnings: Disconnect the battery before working on electrical components to avoid shorts or shocks.

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connector for cylinder 2.
3. Remove the ignition coil from cylinder 2 using a socket.
4. Remove the spark plug using a spark plug socket. Inspect the spark plug for wear; replace if damaged.
5. Install the new spark plug to the manufacturer’s torque specification (usually around 13-15 lb-ft).
6. Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil

1. If the spark plug is in good condition and the misfire persists, replace the ignition coil on cylinder 2.
2. Remove the ignition coil as previously described.
3. Install the new ignition coil and torque it down to specifications (typically 7-10 lb-ft).
4. Reconnect the ignition coil connector.

4. Inspect and Clean Fuel Injector

1. If misfire persists, check the fuel injector for cylinder 2.
2. Disconnect the fuel injector connector and remove the injector.
3. Check for any blockages or leaks; clean or replace the injector if necessary.
4. Reinstall the injector and reconnect the electrical connector.

5. Compression Test

1. If the issue continues, perform a compression test on cylinder 2.
2. Remove the spark plug from cylinder 2.
3. Insert the compression tester into the spark plug hole and crank the engine.
4. Record the compression reading; it should match the manufacturer's specifications.
5. If the reading is low, further investigation is required for potential internal engine issues.