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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaning kit.
• Disconnect the vehicle's battery to ensure safety while working on electrical components.

2. Inspect and Replace Ignition Components

• Sub-steps:
  1. Remove the engine cover if applicable to access ignition components.
  2. Disconnect the electrical connector from the ignition coil of cylinder 1.
  3. Remove the ignition coil using a socket. Inspect for cracks or damage.
  4. Remove the spark plug from cylinder 1 with a spark plug socket.
  5. Inspect the spark plug for wear (electrode wear, carbon deposits) and replace if necessary. Use OEM specifications for spark plugs (e.g., heat range, gap).
  6. Reassemble by installing the new spark plug and ignition coil, ensuring proper torque (typically around 15-20 ft-lbs for spark plugs).

3. Fuel Injector Inspection and Cleaning

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 1.
  2. Remove the fuel rail if necessary to access the fuel injector.
  3. Use a multimeter to check the resistance of the fuel injector. Replace if the resistance is outside the manufacturer’s specifications.
  4. Clean the fuel injector using a fuel injector cleaning kit or replace it with a new one.
  5. Reinstall the fuel rail and reconnect the injector.

4. Compression Test

• Sub-steps:
  1. Remove the spark plug from cylinder 1.
  2. Insert the compression tester into the spark plug hole and crank the engine.
  3. Record the compression reading and compare it to manufacturer specifications (usually around 180-200 PSI).
  4. If the compression is low, further investigation into the engine’s internal components may be necessary (e.g., valves, piston rings).