how to fix the P0301 code on my Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to ensure safety during repairs.
• Allow the engine to cool if it has been running.

2. Replace Spark Plug and Ignition Coil

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connector and remove the ignition coil from cylinder number one.
3. Use a spark plug socket to remove the spark plug from cylinder number one.
   • Tools Required: Spark plug socket, ratchet, torque wrench.
4. Inspect the old spark plug for wear or fouling.
5. Install the new spark plug and torque it to manufacturer specifications (typically around 15-20 lb-ft).
6. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Repair Wiring

1. Visually inspect the wiring harness connected to the ignition coil and fuel injector for any signs of damage or corrosion.
2. Repair or replace damaged wiring as necessary.
3. Ensure all connections are secure.

4. Check for Vacuum Leaks

1. Inspect vacuum hoses connected to the intake manifold for cracks or disconnections.
2. Use a smoke machine or carburetor cleaner to check for leaks around the intake manifold and throttle body while the engine is running.
3. Repair any leaks found.

5. Replace Fuel Injector (if necessary)

1. If the fuel injector is faulty, remove the fuel rail (if applicable) to access the injector.
2. Disconnect the fuel line (use caution as fuel may spill).
3. Remove the faulty injector and replace it with a new one.
4. Reinstall the fuel rail and reconnect the fuel line.