how to fix P0305 code in Ford F-150 13th Generation (2015-2020)

Learn how to diagnose and fix P0305 cylinder 5 misfire in Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, injector pulse tester, multimeter.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery before starting any repairs.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Disconnect the ignition coil connector from the spark plug.
3. Remove the ignition coil using a socket wrench.
4. Remove the spark plug using a spark plug socket.
5. Inspect the spark plug for signs of wear or fouling. Replace if necessary.
6. Install the new spark plug, torque to manufacturer specifications (typically around 13-15 lb-ft).
7. Reinstall the ignition coil and reconnect the connector.

3. Test and Replace Ignition Coil (if necessary)

1. If the spark plug is in good condition, test the ignition coil using a multimeter according to service manual specifications.
2. If the coil fails the test, replace it with a new ignition coil.
3. Reinstall the ignition coil onto the spark plug and reconnect the electrical connector.

4. Check Fuel Injector

1. If the ignition coil and spark plug are fine, connect the injector pulse tester to the fuel injector connector.
2. Start the engine and observe the injector operation.
3. If the injector is not functioning, replace it with a new fuel injector.
4. Reconnect the fuel injector connector after replacement.

5. Final Checks

1. Reconnect the battery.
2. Clear the error codes using the OBD-II scanner.
3. Start the engine and observe for any new codes or symptoms.