how to fix P0301 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: OBD-II scanner, multimeter, socket set, torque wrench, compression tester, vacuum gauge.
• Disconnect the 12V battery to ensure safety while working on electrical components.

2. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Remove the engine cover to access the ignition components.
  2. Disconnect the electrical connector from the ignition coil for cylinder 1.
  3. Remove the ignition coil using a socket set, and inspect for cracks or carbon tracking.
  4. If damaged, replace the ignition coil with a new one. Torque the coil to manufacturer specifications.

3. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the spark plug using a spark plug socket.
  2. Inspect the spark plug for wear, carbon buildup, or oil contamination.
  3. If necessary, replace the spark plug with a new one. Set the gap according to manufacturer specifications.
  4. Reinstall the spark plug and torque it to the recommended specification.

4. Test Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Use a multimeter to check the resistance of the injector; it should match manufacturer specifications.
  3. If the injector is faulty, replace it with a new one, ensuring proper seating and connection.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug again from cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine and record the compression reading. Compare with manufacturer specifications.
  4. If compression is low, further diagnostics may be needed for internal engine issues.