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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Remove Ignition Coil and Spark Plug

• Tools Required: Socket set, torque wrench, ratchet
• Remove the engine cover if necessary to access the ignition coil.
• Disconnect the electrical connector from the ignition coil.
• Unscrew the ignition coil using the socket set and remove it from the cylinder head.
• Using a spark plug socket, carefully unscrew and remove the spark plug from cylinder 1.

3. Inspect and Replace Components

• Tools Required: Visual inspection tools, feeler gauge (if checking spark plug gap)
• Inspect the spark plug for wear or damage. If worn or fouled, replace with a new spark plug of the recommended type (typically NGK or Bosch).
• Check the ignition coil for cracks or signs of failure. If damaged, replace with a new ignition coil.
• Ensure the spark plug gap is within the manufacturer's specifications (usually around 0.040 inches).

4. Reinstall Components

• Carefully install the new spark plug into cylinder 1, hand-tightening it initially, then torque to manufacturer specifications (typically around 15 ft-lbs).
• Reinstall the ignition coil over the spark plug, ensuring it is seated correctly, and secure it with the socket set.
• Reconnect the electrical connector to the ignition coil.

5. Final Checks

• Reconnect the negative battery terminal.
• Clear the P0301 code using the OBD-II scanner.
• Start the engine and allow it to reach operating temperature, monitoring for any check engine light re-illuminating.