how to resolve the P0301 misfire code on my Tesla Outback 5th Generation (2015-2019)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, multimeter, compression tester, vacuum gauge.
• Disconnect the battery to ensure safety during repairs.
• Allow the engine to cool completely before beginning work.

2. Inspect and Replace Spark Plug

• Remove the engine cover if applicable.
• Using a socket set, remove the spark plug from cylinder 1.
• Inspect the spark plug for signs of fouling, damage, or wear.
• If necessary, replace with a new spark plug that meets OEM specifications (typically NGK or Bosch).
• Torque the new spark plug to the manufacturer’s specified value, usually around 13 lb-ft.

3. Check and Replace Ignition Coil

• Locate the ignition coil for cylinder 1 (refer to vehicle service manual for exact location).
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil using a socket set.
• Inspect the coil for cracks or carbon tracking.
• If defective, replace the ignition coil with a new OEM part.
• Reinstall and reconnect the ignition coil.

4. Inspect and Test Fuel Injector

• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the injector's resistance; it should match manufacturer specifications (usually around 12-16 ohms).
• If the injector is faulty, replace it with an OEM fuel injector.
• Reconnect the injector connector after replacement.

5. Perform Compression Test

• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine for a few seconds and record the compression reading.
• Compare the reading to the manufacturer's specifications; if low, further investigation of the cylinder is required.