my Tesla Model S Plaid/Refresh (2021-present) has a P0301 code, what does it mean?

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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle's 12V battery to prevent electrical shock.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Locate and remove the spark plug wire or ignition coil from cylinder 1.
• Use a spark plug socket to remove the spark plug.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace with a new spark plug (refer to manufacturer specifications for part number).
• Torque the new spark plug to the specified value (typically 15-20 ft-lbs).

3. Check and Replace Ignition Coil

• Remove the ignition coil from cylinder 1 after disconnecting the electrical connector.
• Inspect the ignition coil for cracks or damage.
• If faulty, replace with a new ignition coil compatible with the Tesla Model S Plaid.
• Ensure the new coil is seated properly and reconnect the electrical connector.

4. Fuel Injector Inspection

• Remove the fuel rail assembly if necessary to access the fuel injector for cylinder 1.
• Inspect the injector for clogs or leaks.
• If faulty, replace the fuel injector with a new one that meets Tesla specifications.
• Reinstall the fuel rail securely, ensuring proper sealing.

5. Compression Test (if misfire persists)

• Use a compression gauge to check the compression in cylinder 1.
• Follow manufacturer guidelines for normal compression values.
• If compression is low, further investigation into the engine’s internals may be necessary (e.g., valve issues or piston rings).