how to fix P0301 code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the vehicle's battery to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover (if applicable).
• Locate the spark plug for cylinder 1 (usually near the front of the engine).
• Using the spark plug socket, unscrew and remove the spark plug.
• Inspect the spark plug for wear or fouling; replace if necessary.
• Apply dielectric grease to the threads of the new spark plug.
• Install the new spark plug by hand to avoid cross-threading, then torque to the manufacturer’s specifications (typically around 13-20 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Locate the ignition coil for cylinder 1.
• Remove the electrical connector from the ignition coil.
• Unscrew the ignition coil from its mounting (typically two bolts).
• Install the new ignition coil and torque it to the manufacturer's specifications.
• Reconnect the electrical connector.

4. Inspect and Test Fuel Injector

• Tools Required: Fuel injector tester or multimeter.
• Disconnect the fuel injector connector for cylinder 1.
• Using a multimeter, check the resistance of the injector; compare it against the specifications found in the service manual.
• If the injector is faulty, remove it and install a new one, ensuring proper sealing and connection upon installation.

5. Compression Test (if needed)

• Tools Required: Compression tester.
• Remove the ignition coil and spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine a few times to get a reading; compare the results to manufacturer specifications.
• If the compression is low, further investigation into engine internals may be necessary.