how to fix P0301 misfire code in Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface, and the ignition is off.
• Disconnect the negative battery terminal for safety.

2. Inspect and Replace Spark Plug

1. Remove the engine cover to access the spark plug.
2. Using a spark plug socket, carefully remove the spark plug from cylinder 1.
3. Inspect the spark plug for wear, carbon buildup, or damage. Replace if necessary.
4. Install a new spark plug, ensuring it is properly gapped according to manufacturer specifications (generally around 0.040 inches).
5. Torque the spark plug to the manufacturer's specified value (usually about 13 lb-ft).

3. Inspect and Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil.
2. Unbolt the ignition coil from its mounting point.
3. Replace with a new ignition coil compatible with the Tesla Model S.
4. Reconnect the electrical connector securely.

4. Check and Replace Fuel Injector

1. Remove the fuel injector rail cover if applicable.
2. Disconnect the fuel injector electrical connector for cylinder 1.
3. Remove the injector rail and replace the faulty injector with a new one.
4. Reinstall the fuel injector rail, ensuring proper sealing.

5. Reassembly and Final Checks

1. Reinstall the engine cover and reconnect the negative battery terminal.
2. Start the vehicle and allow it to idle. Monitor for any warning lights or unusual noises.