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 necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the vehicle to cool down before starting work.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate and remove the spark plug for cylinder 1 using a spark plug socket.
  3. Inspect the spark plug for signs of wear, such as carbon buildup or damage.
  4. If necessary, replace the spark plug with a manufacturer-recommended part.
  5. Torque the new spark plug to the manufacturer's specifications (usually around 15-20 lb-ft).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Detach the connector from the ignition coil of cylinder 1.
  2. Remove the ignition coil using the appropriate socket.
  3. Inspect the ignition coil for any physical damage or corrosion.
  4. Replace the ignition coil if it shows signs of malfunction.
  5. Reinstall the new ignition coil and connect the wiring harness securely.

4. Test Fuel Injector

• Sub-steps:
  1. Locate the fuel injector for cylinder 1 and disconnect its electrical connector.
  2. Perform a resistance test using a multimeter on the injector terminals (should typically show around 12-16 Ohms).
  3. If the injector is faulty, replace it with a new one.
  4. Reconnect the electrical connector and ensure it is secured.

5. Check Compression

• Sub-steps:
  1. Remove spark plugs from all cylinders for easier access.
  2. Insert a compression gauge into the cylinder 1 spark plug hole.
  3. Crank the engine and note the compression reading; it should meet manufacturer specifications (typically around 150-200 psi).
  4. If the compression is low, further diagnosis may be needed for valve or piston issues.