my Tesla Model 3 Original (2017-2023) shows error code P0301, how to resolve this?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, dielectric grease.
• Remove the engine cover if necessary (unclip and lift).
• Remove the spark plug wire or ignition coil connector for cylinder 1.
• Use the spark plug socket to unscrew and remove the spark plug.
• Inspect the spark plug for electrode wear and carbon buildup.
• If worn, replace with a new spark plug, ensuring it is gapped according to manufacturer's specifications (usually around 0.028-0.060 inches).
• Apply a small amount of dielectric grease to the connector before reattaching.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, ratchet, torque wrench.
• Remove the ignition coil securing bolts.
• Gently pull the ignition coil to disconnect it from the spark plug.
• Inspect the ignition coil for cracks or carbon tracking.
• If defective, replace with a new ignition coil, tightening bolts to manufacturer's torque specifications (typically around 80-100 in-lbs).

4. Check Fuel Injector

• Tools Required: Noid light or multimeter, fuel injector cleaner (optional).
• Disconnect the fuel injector connector for cylinder 1.
• Use a noid light to check for pulse; if no light, check wiring for shorts or damage.
• If the injector is faulty, replace it by removing the retaining clips and pulling it out of the rail.
• Install the new injector and reconnect the electrical connector.

5. Reassemble and Reconnect Battery

• Reattach any components removed during the repair (engine cover, connectors).
• Reconnect the negative battery terminal.
• Start the vehicle and check for any error codes.