how to fix the P0301 code in my 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) using a socket set.
• Disconnect the ignition coil connector for cylinder 1.
• Unbolt the ignition coil (typically requires a socket wrench).
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the spark plug for wear or damage; replace if necessary.
• Install a new spark plug, ensuring it is gapped to manufacturer specifications (usually around 0.040 inches).
• Reattach the ignition coil and connector.

3. Check and Replace Fuel Injector

• Locate the fuel injector for cylinder 1.
• Disconnect the fuel injector connector.
• Remove the fuel injector using the appropriate tool (may require a special puller).
• Inspect the injector for clogs or leaks; replace if faulty.
• Install a new fuel injector and reconnect the connector.

4. Perform Compression Test

• Remove the spark plug for cylinder 1 again.
• Insert the compression tester into the spark plug hole.
• Crank the engine and read the compression value; compare it to the manufacturer's specifications.
• If compression is low, further engine diagnostics may be required.

5. Check for Vacuum Leaks

• Inspect the intake manifold and associated hoses for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to check for leaks while the engine is running.
• Repair any identified leaks to ensure proper air-fuel mixture.