how to fix the 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 tools and parts required for the repair.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the negative terminal of the battery to ensure safety.

2. Inspect and Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Using a socket wrench, carefully remove the spark plug from cylinder 1.
  3. Inspect the spark plug for wear, carbon buildup, or damage.
  4. If necessary, replace it with a new spark plug that meets manufacturer specifications.
  5. Torque the new spark plug to the specified value (typically around 12-15 ft-lbs).
  6. Reinstall the engine cover.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil on cylinder 1.
  2. Remove the ignition coil using a socket wrench.
  3. Inspect the coil for cracks or signs of failure.
  4. Replace with a new ignition coil if damaged.
  5. Reconnect the electrical connector and ensure it clicks into place.

4. Check and Repair Vacuum Leaks

• Sub-steps:
  1. Inspect hoses and connections around the intake manifold for cracks or disconnections.
  2. Use a smoke tester if available, to identify leaks in the intake system.
  3. Replace any damaged hoses or seals as necessary.

5. Test Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector from cylinder 1.
  2. Using a multimeter, check the resistance of the fuel injector to ensure it’s within specifications (usually around 12-16 ohms).
  3. If the injector is faulty, replace it with a new one.
  4. Reconnect the fuel injector connector.