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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for wear, carbon buildup, or damage.
• Replace the spark plug if necessary with the manufacturer-recommended type (e.g., NGK or Bosch).
• Reinstall the spark plug and torque to the manufacturer's specifications (typically around 18-22 lb-ft).

3. Inspect and Replace Ignition Coil

• Locate the ignition coil for cylinder 1 and disconnect the electrical connector.
• Remove the ignition coil using a socket and ratchet.
• Inspect for cracks or excessive wear; replace if damaged.
• Install the new ignition coil and reconnect the electrical connector, ensuring it is secure.

4. Test and Replace Fuel Injector

• Using a noid light, check the fuel injector signal. If no signal is detected, consider wiring issues.
• If the injector is receiving signal but not functioning, remove it using a fuel injector puller.
• Inspect for clogs or damage and replace with a new fuel injector if necessary.

5. Compression Test

• Perform a compression test on cylinder 1 using a compression gauge.
• If compression is below the manufacturer's specifications (typically around 150-200 psi), further internal engine diagnosis is required.