how to fix P0300 code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal of the 12V battery to ensure safety.
• Ensure the vehicle is on a level surface and securely supported.

2. Inspect and Replace Ignition Components

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coils from each cylinder by removing the electrical connectors.
  3. Remove the ignition coils by unscrewing them from the engine.
  4. Inspect spark plugs for wear; replace if they are worn or fouled.
     • Torque new spark plugs to the manufacturer’s specifications (typically around 18-22 ft-lbs).
  5. Reinstall ignition coils, ensuring they are seated properly and reconnect electrical connectors.

3. Fuel System Inspection and Repair

• Sub-steps:
  1. Check fuel pressure using a fuel pressure gauge to ensure it meets specifications.
  2. If fuel pressure is low, inspect the fuel pump and fuel filter for clogs or failures.
  3. Clean or replace fuel injectors as necessary, ensuring they spray evenly.
  4. Reconnect all components and secure any loose connections.

4. Check for Vacuum Leaks

• Sub-steps:
  1. Inspect all vacuum hoses for cracks, breaks, or disconnections.
  2. Use a smoke machine or carburetor cleaner to identify leaks around the intake manifold.
  3. Replace any damaged hoses or reseal connections to eliminate leaks.

5. Engine Compression Test

• Sub-steps:
  1. Remove spark plugs to access the cylinders.
  2. Insert a compression gauge into each cylinder and crank the engine.
  3. Compare the compression readings to manufacturer specifications; replace or repair any cylinders with significantly lower compression.