how to fix the engine misfire code P0302 in my Ram 1500 DT (2019-Present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on the vehicle.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 2 (consult owner's manual for specific location).
• Use a spark plug socket to remove the old spark plug.
• Inspect the spark plug for wear or fouling. If damaged, replace it with a new spark plug that meets manufacturer specifications.
• Torque the new spark plug to the manufacturer's recommended specification (usually around 13-15 lb-ft for most applications).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Disconnect the electrical connector from the ignition coil for cylinder 2.
• Remove the mounting bolts securing the ignition coil.
• Replace the ignition coil with a new one, ensuring it is the correct part for the vehicle.
• Reinstall the bolts and torque them to the manufacturer's specification (usually around 10-15 lb-ft).
• Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel line disconnect tool, socket set.
• Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
• Disconnect the fuel lines from the injector rail (use the fuel line disconnect tool).
• Remove the retaining bolts for the fuel rail and gently lift it off.
• Replace the fuel injector for cylinder 2, ensuring it is properly seated.
• Reassemble the fuel rail and reconnect the fuel lines, ensuring there are no leaks.

5. Final Checks

• Reconnect the negative battery terminal.
• Start the engine and allow it to idle. Monitor for any misfire symptoms.
• If no issues are present, proceed to clear the trouble codes using the OBD-II scanner.