how to troubleshoot P0301 code on Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Tools Required: OBD-II scanner, spark plug socket, torque wrench, compression tester, fuel pressure gauge, multimeter.
• Safety Warnings: Ensure the vehicle is in "Park" mode and on a flat surface. Disconnect the high voltage battery before working on electrical components.

2. Replace Ignition Components

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the electrical connector from the ignition coil on cylinder 1.
3. Remove the ignition coil using the appropriate socket.
4. Replace the spark plug by unscrewing it with a spark plug socket. Inspect the old spark plug for signs of wear or fouling.
5. Install the new spark plug with the correct torque (usually around 15-20 lb-ft, but check specifications).
6. Reinstall the ignition coil and connect the electrical connector.

3. Check Fuel Injector

1. Remove the fuel rail if necessary, following the specific procedure for your model.
2. Inspect the injector for clogs or leaks.
3. Replace the fuel injector if it is found to be defective.
4. Reinstall the fuel rail and ensure all connections are secure.

4. Perform Compression Test

1. Remove the spark plug from cylinder 1.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine to take the compression reading.
4. Compare the reading to manufacturer specifications. If low, further investigation is needed into possible internal engine problems.