how to fix the P0301 misfire code on my Tesla Model S Original (2012-2020)

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

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the vehicle's battery to ensure safety during the repair process.
• Allow the engine to cool if it was recently running.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, dielectric grease.
• Remove the engine cover if necessary to access the spark plug.
• Use a spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for fouling or excessive wear; replace if necessary.
• Install the new spark plug using a torque wrench to the manufacturer's specified torque (typically around 15 ft-lbs).
• Apply dielectric grease to the spark plug boot before reinstallation.

3. Check and Replace Ignition Coil

• Tools Required: Ratchet, socket set.
• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Remove the ignition coil bolt and carefully pull the coil out of the cylinder head.
• Inspect the coil for cracks or damage; replace if necessary.
• Install the new ignition coil and secure it with the bolt. Reconnect the electrical connector.

4. Inspect and Test Fuel Injector

• Tools Required: Fuel injector removal tool, multimeter (if testing electrical connections).
• Disconnect the fuel injector connector on cylinder 1.
• Remove the fuel rail if necessary to access the injector; be cautious of fuel spills.
• Inspect the injector for clogs or leaks; replace if necessary.
• If testing, use a multimeter to check the resistance of the injector (should be within manufacturer specifications).

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove all spark plugs to allow for even cranking.
• Insert the compression tester into cylinder 1 and crank the engine.
• Compare the reading to the manufacturer's specifications; low compression indicates internal engine issues.