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

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Gather necessary tools and parts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coil connector from the spark plug.
  3. Remove the ignition coil using a socket set.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear; replace it if necessary with a new spark plug that meets manufacturer specifications (typically NGK or Mopar).
  6. Reinstall the spark plug and torque it to the manufacturer’s specification (usually around 13-15 lb-ft).
  7. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug is fine, proceed to inspect the ignition coil.
  2. Use a multimeter to check the coil’s primary and secondary resistance against specifications.
  3. If the coil is faulty, replace it with a new ignition coil that matches the OEM specifications.
  4. Reconnect the ignition coil connector.

4. Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Install a compression gauge into the spark plug hole.
  3. Crank the engine several times to obtain a compression reading.
  4. Compare the readings to the manufacturer's specifications; if low, further engine diagnostics may be necessary.

5. Fuel Injector Inspection

• Sub-steps:
  1. Remove the fuel rail to access the fuel injector for cylinder 1.
  2. Inspect the injector for blockage or damage; clean or replace as needed.
  3. Reinstall the fuel rail and ensure all connections are secure.