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

Solution

1. Preparation

• Gather tools and parts before starting the repair.
• Disconnect the negative terminal of the battery to prevent electrical shock.
• Allow the vehicle to cool down if the engine has been running.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable (use a socket set).
2. Locate cylinder 1 spark plug (refer to service manual for exact location).
3. Use a spark plug socket to remove the spark plug; inspect for wear or fouling.
4. Replace with a new spark plug, ensuring the gap is set to manufacturer specifications.
5. Torque the spark plug to the manufacturer's specified value (usually around 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

1. Remove the ignition coil connector by pressing the release tab.
2. Unscrew the ignition coil using a socket set.
3. Remove the ignition coil from the cylinder head.
4. Install the new ignition coil, ensuring it is seated properly.
5. Reconnect the ignition coil connector securely.

4. Inspect and Clean Fuel Injector

1. Locate the fuel injector for cylinder 1 (may require intake manifold removal).
2. Disconnect the fuel injector electrical connector.
3. Remove the fuel line carefully (use caution as fuel may leak).
4. Remove the fuel injector from the rail; inspect for clogs or leaks.
5. Clean or replace the fuel injector as necessary.
6. Reinstall the fuel injector and reconnect the fuel line securely.

5. Perform Compression Test

1. Remove the spark plug from cylinder 1.
2. Insert the compression gauge into the spark plug hole.
3. Crank the engine for a few seconds to take a reading.
4. Compare the compression reading to manufacturer specifications.
5. If compression is low, further investigation into valve or piston issues may be needed.