how to resolve P0301 misfire code in my Tesla Model S Plaid/Refresh (2021-present)?

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 all necessary tools and parts.
• Safety: Disconnect the 12V battery to prevent electrical shock.
• Tools Required: Socket set, torque wrench, compression tester, OBD-II scanner, multimeter.

2. Inspect and Replace Ignition Coil

• Locate the ignition coil for cylinder 1.
• Remove the electrical connector from the ignition coil.
• Unscrew the ignition coil using the socket set.
• Replace with a new ignition coil.
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Spark Plug

• Remove the ignition coil to access the spark plug.
• Use a spark plug socket to unscrew and remove the spark plug.
• Inspect the spark plug for signs of wear or fouling. Replace if necessary with the manufacturer's recommended spark plug.
• Gap the new spark plug as per specifications.
• Reinstall the spark plug and the ignition coil.

4. Check and Clean Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Remove the fuel injector using the appropriate tools.
• Inspect for clogs or debris; clean using a fuel injector cleaner if necessary.
• Reinstall or replace the fuel injector as needed.

5. Verify Compression

• Insert a compression tester into the spark plug hole for cylinder 1.
• Crank the engine to check the compression reading; it should match manufacturer specifications.
• If compression is low, further investigation into engine internals may be necessary.