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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle’s battery to ensure safety.
• Allow the engine to cool down before starting work.

2. Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, ratchet.
• Remove the spark plug wire or connector from cylinder 1.
• Use a spark plug socket to carefully unscrew and remove the old spark plug.
• Inspect the spark plug for signs of fouling or wear.
• Install the new spark plug by hand to avoid cross-threading, then torque it to the manufacturer's specification (usually around 13-20 lb-ft).

3. Test or Replace Ignition Coil

• Tools Required: Multimeter (if testing), socket set.
• Disconnect the ignition coil connector and remove the ignition coil from cylinder 1.
• If testing, use a multimeter to check the coil's primary and secondary resistance according to the service manual specifications. Replace if it’s outside the range.
• If replacing, install the new ignition coil, ensuring it is seated properly, and reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, socket set.
• Access the fuel injector for cylinder 1 by removing any necessary components (intake manifold, etc.).
• Remove the fuel injector and inspect it for clogs; clean it with a fuel injector cleaning solution if necessary.
• If the injector is faulty, replace it with a new one and ensure it is properly seated.

5. Reassemble and Reconnect

• Reinstall any components removed during the procedure.
• Reconnect the battery and ensure all connections are secure.