how to fix P0301 misfire code in Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and ensure the vehicle is in a safe and flat workspace.
• Disconnect the vehicle's 12V battery to prevent electrical shorts.
• Tools required: Socket set, torque wrench, OBD-II scanner, compression gauge, multimeter.

2. Replace Spark Plug

1. Remove the engine cover to access spark plugs.
2. Use a socket wrench to remove the spark plug from cylinder 1.
3. Inspect the old spark plug for wear and replace it with a new one.
4. Torque the new spark plug to manufacturer specifications (typically around 15-25 lb-ft, check specific specs).

3. Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil on cylinder 1.
2. Remove the ignition coil from the cylinder head by unbolting it.
3. Install the new ignition coil and reconnect the electrical connector.
4. Torque the ignition coil bolts to the manufacturer's specifications.

4. Test Fuel Injector

1. Disconnect the fuel injector connector for cylinder 1.
2. Use a multimeter to check for proper resistance; it should match specifications (usually between 12-16 ohms).
3. If necessary, replace the fuel injector with a new one.

5. Perform Compression Test

1. Remove the spark plug for cylinder 1.
2. Insert the compression gauge into the spark plug hole.
3. Crank the engine and record the compression reading.
4. If the reading is below manufacturer specifications, further diagnosis may be needed to check for internal engine issues.