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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety while working on electrical components.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench
• Remove the ignition coil from cylinder 1 by unscrewing the bolts.
• Pull the ignition coil out gently to avoid damage.
• Remove the spark plug using a spark plug socket and inspect for wear.
  • If the spark plug is worn or fouled, replace it with a new one (ensure correct gap per manufacturer specifications).
• Reinstall the spark plug, torque to manufacturer specifications (typically around 13-15 lb-ft).
• Reinstall the ignition coil and secure with bolts.

3. Check and Replace Ignition Coil

• If the ignition coil was found faulty during inspection, replace it.
• Disconnect the electrical connector from the ignition coil.
• Remove bolts securing the ignition coil and replace it with a new one.
• Reconnect the electrical connector and ensure it clicks into place.

4. Inspect and Replace Fuel Injector

• Tools Required: Fuel injector puller (if necessary), socket set
• Disconnect the fuel injector electrical connector.
• Remove the fuel rail if necessary to access the injector.
• Remove the old fuel injector and inspect it for debris or clogs.
• Replace with a new fuel injector if necessary, ensuring proper seating and connection.
• Reassemble the fuel rail if removed.

5. Perform Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine for several seconds and read the compression value.
• If the compression is below specifications, further engine service may be required.