how to fix P0301 misfire code on my Ram 1500 DT (2019-Present)?

Solution

1. Preparation

• Gather tools and parts needed for repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before beginning the repair.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil by unscrewing the bolts and disconnecting the electrical connector.
• Using a spark plug socket, carefully remove the old spark plug.
• Inspect the spark plug hole for debris; clean if necessary.
• Install the new spark plug, ensuring it is gapped correctly (check manufacturer specifications).
• Torque the spark plug to the manufacturer's specifications (typically around 13 lb-ft for most spark plugs).

3. Test and Replace Ignition Coil (if needed)

• Tools Required: Multimeter.
• Test the ignition coil for proper resistance according to the service manual specifications.
• If the coil is faulty, remove it and install the new ignition coil. Reconnect the electrical connector securely.

4. Inspect and Replace Fuel Injector (if needed)

• Tools Required: Fuel injector removal tool, O-rings.
• Disconnect the fuel line and electrical connector from the fuel injector in cylinder 1.
• Remove the old fuel injector using the removal tool.
• Install the new fuel injector with a new O-ring and ensure it is seated correctly.

5. Perform Compression Test

• If misfire persists, conduct a compression test on cylinder 1.
• Ensure all spark plugs are removed for accurate readings.
• Compare the compression readings to the manufacturer's specifications. If low, further investigation may be needed for internal engine issues.