how to fix P0301 misfire code in Tesla Outback 5th Generation (2015-2019)?

Solution

1. Preparation

• Gather tools and parts necessary for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent any electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Use a socket set to unbolt the coil.
  • Carefully lift the coil off the spark plug.
• Remove the spark plug:
  • Use a spark plug socket to unscrew and remove the spark plug from the cylinder.
• Inspect the spark plug:
  • Check for signs of wear, carbon buildup, or damage.
• Replace with a new spark plug if necessary:
  • Gap the new spark plug to the manufacturer’s specifications (typically around 0.044 inches for Subaru).
  • Install the new spark plug and torque it to the manufacturer’s specifications (usually around 13 ft-lbs).

3. Inspect and Replace Ignition Coil

• Test the ignition coil for resistance using a multimeter:
  • Compare readings to the manufacturer’s specifications.
• If faulty, replace the ignition coil:
  • Install the new coil over the spark plug and secure it with the retaining bolts.

4. Inspect and Clean Fuel Injector

• Remove the fuel rail if necessary to access the injector:
  • Disconnect any fuel lines and electrical connectors.
  • Remove bolts securing the fuel rail and lift it off.
• Inspect the fuel injector for clogs:
  • Clean or replace the injector as needed.
• Reinstall the fuel rail and secure it with bolts.

5. Conduct Compression Test

• Install a compression gauge in the spark plug hole for cylinder 1:
  • Crank the engine a few times to get a reading.
• If compression is low, further investigation into engine internals may be required.