how to fix P0301 cylinder 1 misfire 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 necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the negative terminal of the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, gap gauge.
• Remove the engine cover if applicable.
• Locate and remove the spark plug on cylinder 1.
• Inspect the spark plug for wear, carbon buildup, or damage.
• Replace the spark plug if necessary, ensuring the gap is according to manufacturer specifications (typically around 0.30-0.35 inches for most vehicles).
• Torque the new spark plug to the manufacturer’s specifications (check service manual for exact torque values).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, ratchet.
• Remove the ignition coil from cylinder 1 after disconnecting its electrical connector.
• Inspect the ignition coil for cracks or damage.
• Replace the ignition coil if it shows signs of failure.
• Reinstall the new ignition coil and reconnect the electrical connector.

4. Check and Replace Fuel Injector

• Tools Required: Fuel injector puller (if necessary), fuel line disconnect tool.
• Ensure the fuel system is depressurized before disconnecting the fuel line.
• Remove the fuel injector for cylinder 1 by disconnecting the electrical connector and unclipping the fuel line.
• Inspect the injector for clogs or damage.
• Replace the fuel injector if it is malfunctioning or clogged.
• Reinstall the injector and ensure all connections are secure.

5. Compression Test

• Tools Required: Compression tester.
• Reinstall spark plug and ignition coil temporarily.
• Remove the fuel pump fuse to prevent fuel from entering the system during the test.
• Crank the engine while monitoring the compression gauge for cylinder 1.
• Compare the compression reading to factory specifications (usually 150-200 psi).
• If compression is low, further investigation is needed for potential internal engine issues.