how to fix P0301 code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, fuel injector tester
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector from cylinder 1.
  3. Remove the ignition coil using a socket wrench.
  4. Extract the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear and replace if necessary (gapping to manufacturer's specification).
  6. Reinstall the spark plug and ignition coil, ensuring proper torque specifications (typically 13-15 lb-ft).

3. Test and Replace Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Connect a fuel injector tester to check for proper operation.
  3. If the injector is faulty, remove it using the appropriate tool and replace it with a new one.
  4. Reconnect the fuel injector connector.

4. Perform Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine to obtain a compression reading.
  4. Compare the reading with manufacturer specifications; if low, further diagnostics may be required (consider valve issues or head gasket failure).

5. Check for Vacuum Leaks

• Sub-steps:
  1. Inspect vacuum hoses connected to the intake manifold and throttle body.
  2. Use a smoke machine to identify any leaks if visually inspecting does not yield results.
  3. Replace any damaged hoses or gaskets found.