how to fix a misfire code P0301 in my Tesla Model 3 Original (2017-2023)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative terminal of the battery to prevent electrical shocks.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the spark plug cover if applicable.
• Use a spark plug socket to carefully remove the spark plug from cylinder 1.
• Inspect the spark plug for wear; replace if necessary.
• Install the new spark plug by hand to avoid cross-threading, then tighten to the manufacturer’s specified torque (typically around 18-22 ft-lbs).

3. Check and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil bolt and carefully pull the coil out.
• Inspect the coil for cracks or carbon tracking; replace if defective.
• Install the new ignition coil, securing it with the bolt and reconnecting the electrical connector.

4. Inspect and Test Fuel Injector

• Tools Required: Fuel injector cleaning kit, multimeter.
• Remove the fuel rail cover if applicable.
• Disconnect the fuel injector connector from cylinder 1.
• Use a multimeter to test the resistance of the fuel injector; replace if it falls outside the manufacturer's specifications.
• If cleaning, follow the fuel injector cleaning instructions; otherwise, replace the injector.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression reading and compare it to manufacturer specifications.
• If the reading is low, further investigation into internal engine components may be necessary.