how to fix P0301 code for misfire in my Tesla Model S Plaid/Refresh (2021-present)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool before working on any components.

2. Inspect and Replace Spark Plug

1. Remove Engine Cover:

   • Use a socket set to remove bolts securing the engine cover.
   • Carefully lift the cover off and set it aside.

2. Remove Spark Plug:

   • Use a spark plug socket to carefully unscrew the spark plug from cylinder 1.
   • Inspect the spark plug for signs of wear, carbon deposits, or damage.

3. Install New Spark Plug:

   • Apply anti-seize compound to the threads of the new spark plug.
   • Hand-tighten the new spark plug into cylinder 1 and then torque to manufacturer specifications (typically around 15-20 lb-ft).

3. Inspect and Replace Ignition Coil

1. Remove Ignition Coil:

   • Disconnect the ignition coil connector carefully.
   • Unscrew the bolts securing the ignition coil and gently pull it out.

2. Install New Ignition Coil:

   • Position the new ignition coil in place and secure it with bolts.
   • Reconnect the ignition coil connector.

4. Check and Clean Fuel Injector

1. Remove Fuel Injector:

   • Disconnect the fuel injector connector and fuel line (ensure to relieve fuel pressure before doing this).
   • Unscrew bolts securing the fuel rail and remove the injector from cylinder 1.

2. Clean or Replace Fuel Injector:

   • Clean the injector using an appropriate injector cleaner or replace it if necessary.
   • Reinstall the injector into the fuel rail and secure it properly.

5. Reassemble Components

• Reinstall the engine cover and secure it with bolts.
• Reconnect the negative terminal of the battery.