how to diagnose P0302 misfire code on Ram 1500 DT (2019-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety during the process.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2 using a socket set.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear; replace if it is fouled or worn.
• Reinstall the new spark plug, torquing to the manufacturer's specification (typically around 13-15 ft-lbs).

3. Check and Replace Ignition Coil (if necessary)

• If the spark plug is in good condition, proceed to inspect the ignition coil.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil from the cylinder head.
• Install a new ignition coil and reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

• If misfire persists, check the fuel injector functionality.
• Disconnect the fuel injector connector.
• Remove the fuel injector by unbolting or unclipping it from the fuel rail.
• Install a new fuel injector, ensuring proper seating and connection.

5. Reassemble and Reconnect

• Reinstall any components removed during the process (e.g., intake manifold, engine covers).
• Reconnect the battery.