my Ram 1500 DT (2019-Present) has a check engine light and P0301 code, how to fix?

Solution

1. Preparation

• Gather all required tools and parts.
• Ensure the vehicle is parked on a flat surface, with the engine off and cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Use a socket set to remove the mounting bolts.
  • Gently pull the coil straight out of the spark plug.
• Remove the spark plug:
  • Use a spark plug socket and ratchet to carefully unscrew the spark plug.
• Inspect the spark plug:
  • Check for carbon buildup, damage, or wear. Replace if necessary.
• Install a new spark plug:
  • Apply anti-seize compound to the threads of the new spark plug (if recommended).
  • Torque to manufacturer specifications (typically around 13-15 lb-ft).

3. Check and Replace Ignition Coil (if necessary)

• Test the ignition coil for resistance:
  • Use a multimeter to measure the primary and secondary resistance. Compare with specifications.
• If the coil is faulty, replace it:
  • Install the new ignition coil by reversing the removal process.
  • Ensure it is seated correctly on the spark plug.

4. Inspect and Clean Fuel Injector (if necessary)

• Remove the fuel injector from cylinder 1:
  • Disconnect the electrical connector and fuel line.
  • Remove the mounting bolts and gently pull the injector out.
• Clean the injector using a specialized cleaner or replace it if clogged or damaged.
• Reinstall the fuel injector, ensuring proper sealing.

5. Reassemble and Final Checks

• Reattach the ignition coil and any other components removed during disassembly.
• Reconnect the negative battery terminal.
• Start the engine and allow it to idle.