how to troubleshoot a P0301 code in Tesla Model 3 Original (2017-2023)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's 12V battery to ensure safety during repairs.
• Ensure the vehicle is parked on a flat surface and use wheel chocks.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the engine cover if necessary to access the spark plugs.
• Use the socket set to remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of fouling or damage. Replace if necessary.
• Install the new spark plug and torque it to the manufacturer's specifications (typically around 15-20 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Screwdriver set.
• Disconnect the electrical connector from the ignition coil for cylinder 1.
• Remove the mounting screws for the ignition coil and take out the coil.
• Inspect for cracks or damage. Replace if necessary.
• Install the new ignition coil and reconnect electrical connectors.

4. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, cleaning kit.
• Remove the fuel rail to access the injector for cylinder 1.
• Disconnect the fuel line and electrical connector from the injector.
• Remove the injector and inspect for clogs.
• Clean the injector using a fuel injector cleaner and reassemble.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug for cylinder 1.
• Insert the compression tester and crank the engine to get a reading.
• Compare the reading to the manufacturer’s specifications (typically around 180-200 psi).
• If the compression is low, further investigation is required for potential internal engine issues.