my Tesla Model S Plaid/Refresh (2021-present) has a P0301 code what should I check

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface, and park it safely.
• Disconnect the negative battery terminal to prevent electrical shocks.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Use a spark plug socket to remove the spark plug from cylinder 1.
3. Inspect the spark plug for wear or fouling.
4. If worn, replace with a new spark plug (refer to Tesla's specifications for the correct part number).
5. Torque the new spark plug to the manufacturer's specified setting (usually around 18 lb-ft for most spark plugs).
6. Reattach the engine cover if it was removed.

3. Inspect and Replace Ignition Coil

1. Locate the ignition coil for cylinder 1 (usually positioned on top of the spark plug).
2. Disconnect the electrical connector from the ignition coil.
3. Remove the ignition coil using an appropriate socket.
4. Inspect the coil for damage or corrosion; replace if necessary.
5. Install a new ignition coil, ensuring it is seated properly.
6. Reconnect the electrical connector.

4. Check and Clean Fuel Injector

1. Locate the fuel injector for cylinder 1.
2. Disconnect the electrical connector and fuel line (use caution as fuel may spill).
3. Inspect the injector for clogs or damage; clean or replace as needed.
4. Reattach the fuel line and electrical connector.

5. Conduct Compression Test

1. Remove the spark plug for cylinder 1.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine several times to get a reading.
4. Compare the reading to the manufacturer's specifications; if low, further investigation into the engine internals may be necessary.