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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the vehicle’s 12V battery to avoid electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 1.
• Using the spark plug socket, remove the spark plug.
• Inspect the spark plug for fouling, wear, or damage.
• If necessary, replace the spark plug with a new one, ensuring it meets manufacturer specifications.
• Torque the new spark plug to the recommended value (typically around 15-20 lb-ft).

3. Check and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil cover if present.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil from cylinder 1.
• Inspect the coil for damage or corrosion.
• Replace with a new ignition coil if any issues are found.
• Reinstall the ignition coil and reconnect the electrical connector.
• Torque the ignition coil to the manufacturer's specifications.

4. Inspect Fuel Injector

• Tools Required: Fuel injector cleaning kit (if necessary), safety glasses.
• Access the fuel injector for cylinder 1.
• Disconnect the electrical connector and fuel line (use caution as fuel may spray).
• Check the fuel injector for clogs or leaks.
• If clogged, use a fuel injector cleaning kit to clean it or replace the injector if necessary.
• Reinstall the injector ensuring a proper seal and reconnect the fuel line.

5. Conduct a Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine for a few seconds and read the compression value.
• Compare the result with the manufacturer’s specifications.
• If the compression is low, further investigation into piston rings or valves may be needed.