how to fix the P0301 code in my Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, noid light, basic hand tools.
• Disconnect the vehicle’s battery to prevent electrical shorts while working on the ignition system.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate the spark plug for cylinder 1.
  3. Using a socket wrench, unscrew and remove the old spark plug.
  4. Inspect the spark plug for signs of wear or fouling.
  5. Install the new spark plug and torque it to the manufacturer's specifications (usually around 12-15 lb-ft).
  6. Reattach any components removed to access the spark plug.

3. Replace Ignition Coil

• Sub-steps:
  1. Disconnect the ignition coil connector on cylinder 1.
  2. Remove the bolts securing the ignition coil.
  3. Pull the ignition coil out of the cylinder head.
  4. Install the new ignition coil and secure it with the bolts.
  5. Reconnect the ignition coil connector.

4. Test Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Use a noid light to check for the injector pulse; if the light does not flash, there may be an issue with the injector or wiring.
  3. If necessary, replace the fuel injector by removing it from the fuel rail and installing a new one, ensuring proper sealing.

5. Perform Compression Test

• Sub-steps:
  1. Remove the spark plug for cylinder 1.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine a few times to measure compression.
  4. Compare the reading with manufacturer specifications; if low, further investigation into engine internals may be required.