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 (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle's 12V battery to ensure safety while working on electrical components.
• Allow the vehicle to cool completely before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the engine cover if applicable.
• Locate cylinder 1 spark plug (refer to vehicle manual for exact location).
• Use the spark plug socket to remove the old spark plug.
• Inspect the old spark plug for wear; replace it if necessary.
• Install the new spark plug and torque it to the manufacturer’s specifications (typically 15-20 ft-lbs).
• Reattach the engine cover.

3. Check and Replace Ignition Coil

• Tools Required: Socket set.
• Disconnect the electrical connector from the ignition coil above cylinder 1.
• Remove any mounting screws or bolts securing the ignition coil.
• Carefully pull the ignition coil out of the cylinder head.
• Inspect the coil for cracks or signs of damage; replace if needed.
• Install the new ignition coil and reconnect the electrical connector.

4. Fuel Injector Testing

• Tools Required: Fuel injector tester (if available).
• Remove the fuel injector connector from cylinder 1.
• Test the fuel injector for continuity and operation using an injector tester.
• Replace the fuel injector if it is not functioning properly.
• Reconnect the fuel injector connector.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare the reading to manufacturer's specifications; replace or repair engine components if compression is low.