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

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the vehicle's battery to ensure safety during repairs.
• Safety glasses and gloves are recommended.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector on cylinder 1.
  3. Remove the ignition coil using a socket set (usually 10mm).
  4. Unscrew the spark plug using a spark plug socket.
  5. Inspect the spark plug for signs of wear or fouling; replace if necessary.
  6. Install a new spark plug, torqueing it to manufacturer's specification (typically 13-15 lb-ft).
  7. Reinstall the ignition coil and connector.

3. Test and Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil is suspected to be faulty, remove it as described above.
  2. Test the ignition coil's resistance with a multimeter; compare to manufacturer specifications.
  3. If the coil is out of spec, replace it with a new ignition coil.
  4. Reconnect the ignition coil and ensure it is seated properly.

4. Inspect and Test Fuel Injector

• Sub-steps:
  1. Access the fuel injector for cylinder 1 by removing any obstructions.
  2. Use a fuel injector tester to check for proper spray pattern and flow.
  3. If the injector is faulty, remove it and replace with a new injector.
  4. Reinstall the fuel rail and ensure all connections are secure.

5. Check Wiring and Compression

• Sub-steps:
  1. Visually inspect the wiring harness for any signs of damage or corrosion.
  2. Use a multimeter to check for continuity in the wiring to the ignition coil and fuel injector.
  3. If wiring issues are found, repair or replace as needed.
  4. Perform a compression test on cylinder 1 to ensure it is within specifications (typically 180-220 psi); if compression is low, further investigation is required.