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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool completely before starting work.

2. Remove Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, ratchet.
• Remove any necessary engine cover or components obstructing access to cylinder 2.
• Disconnect the ignition coil connector and remove the bolts securing the ignition coil to the cylinder head.
• Carefully pull the ignition coil out of the spark plug well.

3. Replace Spark Plug and Ignition Coil

• Inspect the spark plug for wear or damage; replace it if necessary.
  • Sub-steps:
    • Use a spark plug socket to remove the old spark plug.
    • Check the gap on the new spark plug and adjust if necessary (typically around 0.040 inches for most applications).
    • Install the new spark plug and torque to manufacturer specifications (usually around 15-20 ft-lbs).
• Install the new ignition coil onto the spark plug and secure it with bolts, torquing to manufacturer specifications (usually around 89-106 in-lbs).

4. Inspect and Replace Fuel Injector (if needed)

• Tools Required: Fuel injector puller, O-ring pick, torque wrench.
• Disconnect the fuel injector connector and remove the retaining clips.
• Remove the fuel injector from the rail. Check for O-ring wear and replace if necessary.
• Install the new fuel injector ensuring O-rings are lubricated and seated properly. Reinstall the retaining clips.

5. Reassemble and Test

• Reconnect the ignition coil and any components removed during disassembly.
• Reconnect the negative battery terminal and start the engine.
• Monitor for any check engine light reappearance and ensure smooth engine operation.