how to solve the P0301 misfire code in my Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle's 12V battery to ensure safety during repairs.

2. Inspect and Replace Ignition Coil

• Tools Required: Ratchet and socket set, torque wrench
  • Sub-steps:
    1. Locate the ignition coil on cylinder 1 (refer to the vehicle's service manual for location).
    2. Disconnect the electrical connector from the ignition coil.
    3. Remove the ignition coil by unbolting it from the engine.
    4. Install the new ignition coil and torque it to the manufacturer's specifications.
    5. Reconnect the electrical connector securely.

3. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench
  • Sub-steps:
    1. Remove the spark plug using a spark plug socket.
    2. Inspect the spark plug for wear, carbon buildup, or damage.
    3. If necessary, replace with a new spark plug using the correct type specified by Tesla.
    4. Torque the new spark plug to the manufacturer's specifications.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, multimeter
  • Sub-steps:
    1. Disconnect the fuel injector connector.
    2. Use a multimeter to test the injector's resistance; compare with specifications in the service manual.
    3. If the injector is faulty, replace it with a new one.
    4. Reconnect the injector connector after replacement.

5. Final Inspection

• Sub-steps:
  1. Reconnect the vehicle's 12V battery.
  2. Start the engine and let it idle to check for improved performance.
  3. Monitor for check engine light and any abnormal sounds.