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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Compression tester
• Noid light or fuel pressure gauge
• Multimeter

2. Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connector for cylinder 2.
3. Remove the ignition coil bolt and lift the coil out.
4. Remove the spark plug using a spark plug socket.
5. Inspect and replace with a new spark plug (ensure correct gap).
6. Reinstall the ignition coil and reconnect the connector.
7. Replace the engine cover.

3. Test and Replace Ignition Coil

1. Use a multimeter to test the resistance of the ignition coil for cylinder 2, comparing it to the specifications in the service manual.
2. If the coil is faulty, remove it as described in step 2.
3. Install the new ignition coil and reconnect the electrical harness.

4. Inspect and Replace Fuel Injector

1. Use a noid light to check for proper signal to the fuel injector.
2. If no signal is found, trace wiring back to PCM or replace the injector if it’s faulty.
3. To replace the injector, remove the intake manifold if necessary.
4. Disconnect the injector clip and remove the old injector.
5. Install the new injector with new O-rings and reconnect the clip.

5. Perform Compression Test

1. Remove the spark plug from cylinder 2.
2. Install the compression tester into the spark plug hole.
3. Crank the engine for several revolutions and note the reading.
4. Compare with specifications; if low, further investigation into the engine internals is needed.