how can I fix the P0301 misfire code on my Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool before starting the work.

2. Inspect and Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connector for cylinder 1.
3. Unbolt and remove the ignition coil using a socket wrench.
4. Remove the spark plug using a spark plug socket.
5. Inspect the spark plug for wear or carbon buildup; replace if necessary.
   • Torque Specification: Install new spark plug to 18 lb-ft (25 Nm).
6. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil (if necessary)

1. If the ignition coil showed signs of damage or malfunction, replace it with a new one.
2. Follow the same steps as above to remove and replace the ignition coil.
3. Ensure all connections are tight and secure.

4. Check Fuel Injector

1. Locate the fuel injector for cylinder 1.
2. Disconnect the fuel injector connector.
3. Perform an injector resistance test with a multimeter; replace if outside specifications (typically around 12-16 ohms).
4. Reconnect the fuel injector connector.

5. Compression Test (if misfire persists)

1. Remove the spark plug from cylinder 1.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine and record the compression reading.
   • Specifications: Typical compression readings should be above 150 psi (pounds per square inch).
4. If the compression is low, deeper engine repairs may be necessary (e.g., head gasket replacement, valve adjustment).