how to fix P0302 misfire code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery before starting repairs to avoid electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if necessary to access the spark plug.
  2. Use a socket set to carefully remove the spark plug from cylinder 2.
  3. Inspect the spark plug for wear, carbon buildup, or damage.
  4. If damaged, replace it with a new spark plug (manufacturer specifications).
  5. Torque the new spark plug to the manufacturer’s specifications (typically around 15-20 lb-ft).

3. Test and Replace Ignition Coil

• Sub-steps:
  1. Detach the ignition coil from cylinder 2.
  2. Test the ignition coil with a multimeter to ensure proper resistance (check manufacturer specifications).
  3. If faulty, replace with a new ignition coil.
  4. Reattach the ignition coil securely.

4. Inspect and Clean Fuel Injector

• Sub-steps:
  1. Remove the fuel injector from cylinder 2.
  2. Inspect for blockages or clogs.
  3. Clean the injector using a fuel injector cleaner or replace it if necessary.
  4. Reinstall the injector ensuring proper seating and connection.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 2 for easier access.
  2. Insert a compression gauge into the spark plug hole.
  3. Crank the engine and take note of the compression reading.
  4. Compare readings to manufacturer specifications. If low, further investigation may be required into engine internals.