how to address P0300 code on Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface and is in "Park" mode.
• Disconnect the high-voltage battery to ensure safety while working on electrical components.
• Gather necessary tools and parts.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, multimeter
• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coils by unplugging the connectors.
  3. Remove the ignition coils and inspect for wear or carbon buildup.
  4. Replace any faulty ignition coils with OEM parts, ensuring they are seated correctly.
  5. Reconnect the ignition coil connectors.

3. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaning kit, wrench set
• Sub-steps:
  1. Disconnect the fuel injector connectors.
  2. Remove the fuel rail using a wrench set.
  3. Carefully extract the fuel injectors from the rail.
  4. Clean the injectors using the fuel injector cleaning kit per manufacturer instructions.
  5. Reinstall the cleaned or replaced injectors into the fuel rail and reattach the rail.

4. Check and Repair Vacuum Hoses

• Tools Required: Visual inspection tools
• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. Replace any damaged hoses with new ones, ensuring all connections are secure.

5. Reconnect Battery and Reset Codes

• Reconnect the high-voltage battery.
• Use an OBD-II scanner to clear the P0300 code and any other related codes.
• Start the vehicle and monitor for any reoccurrence of the code.