how to fix the 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. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's high-voltage battery and allow the vehicle to sit for a few minutes to ensure all systems are de-energized.
• Ensure you are working in a well-ventilated area.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Use a spark plug socket to carefully remove the spark plug from cylinder 1.
• Inspect the spark plug for wear; if necessary, replace it with a new spark plug specified for your vehicle.
• Torque the new spark plug to the manufacturer's specification, typically around 15-20 lb-ft.

3. Inspect and Replace Ignition Coil

• Disconnect the wiring harness from the ignition coil for cylinder 1.
• Remove the ignition coil by unscrewing the retaining bolts.
• Install a new ignition coil and ensure it is seated properly.
• Reconnect the wiring harness securely.

4. Check/Replace Fuel Injector

• Remove the fuel injector connector for cylinder 1.
• If needed, use a specialized tool to remove and inspect the fuel injector for clogs.
• If the injector is faulty, replace it with a new, compatible fuel injector.
• Reconnect the fuel injector connector.

5. Reconnect Battery and Clear Codes

• Reconnect the high-voltage battery terminals securely.
• Use the OBD-II scanner to clear the P0301 code and any other stored DTCs.
• Start the vehicle and allow it to idle for a few minutes.