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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery negative terminal to avoid electrical shorts.
• Ensure the vehicle is on a level surface and set to park with the parking brake engaged.

2. Inspect Ignition Components

• Tools Required: Socket set, torque wrench, multimeter
• Remove the engine cover if applicable.
• Disconnect the electrical connector from the ignition coil on cylinder 2.
• Remove the ignition coil using a socket set (usually 8mm or 10mm bolts).
• Inspect the ignition coil for cracks or damage; replace if necessary.
• Replace the spark plug in cylinder 2; torque to manufacturer specifications (typically around 13-15 lb-ft).

3. Check Fuel Injector

• Tools Required: Fuel injector removal tool
• Disconnect the wiring harness from the fuel injector on cylinder 2.
• Remove the fuel injector using the appropriate removal tool.
• Inspect the injector for clogs or damage; clean or replace as necessary.
• Reinstall the fuel injector ensuring a proper seal is achieved.

4. Conduct Compression and Fuel Pressure Tests

• Tools Required: Compression tester, fuel pressure gauge
• For the compression test, remove the spark plug from cylinder 2 and insert the compression tester.
• Crank the engine to measure the compression; it should meet the manufacturer’s specifications (usually around 150 psi).
• For the fuel pressure test, connect the fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position without starting the engine. Verify the pressure is within specification (usually between 30-45 psi).

5. Reassemble and Test

• Reinstall all components removed in the previous steps.
• Reconnect the battery terminal.
• Start the engine and let it reach operating temperature.
• Monitor for any misfire codes or engine performance issues.