how to fix P0301 misfire code in my 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

• Gather tools and parts needed for the repair.
• Tools Required: OBD-II scanner, multimeter, compression tester, socket set, torque wrench, fuel injector cleaning kit.
• Safety Warnings: Disconnect the 12V battery before working on electrical components and allow the vehicle to cool.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Disconnect the ignition coil connector and remove the ignition coil using a socket set.
• Remove the spark plug with a spark plug socket.
• Inspect the old spark plug for wear or damage; replace if necessary.
• Install the new spark plug to the manufacturer's specified torque (typically 15-20 ft-lbs).
• Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil

• If the spark plug is in good condition, test or replace the ignition coil.
• Remove the faulty ignition coil.
• Install the new ignition coil and ensure it is seated properly.
• Reconnect the ignition coil connector.

4. Clean or Replace Fuel Injector

• If the fuel injector is faulty, remove it from the engine.
• Clean the injector with a cleaning kit if it is dirty; if damaged, replace it with a new one.
• Reinstall the fuel injector, ensuring a proper seal and connection.

5. Conduct Compression Test

• If misfire persists, perform a compression test on cylinder 1.
• If compression is low, investigate further for head gasket failure or valve issues.