how to troubleshoot P0302 misfire code on Tesla Outback 4th Generation (2010-2014)

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the negative battery terminal.
• Allow the engine to cool down before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the engine cover if necessary.
• Locate the spark plug for cylinder 2 (consult owner’s manual for exact location).
• Use the spark plug socket to remove the old spark plug.
• Inspect the old spark plug for signs of fouling or wear.
• Install a new spark plug, ensuring it is gapped correctly according to specifications (typically around 0.044 inches).
• Torque the spark plug to the manufacturer’s recommended specification (usually around 13-16 ft-lbs).

3. Check and Replace Ignition Coil

• Tools Required: Socket set, multimeter.
• Disconnect the electrical connector from the ignition coil for cylinder 2.
• Remove the ignition coil using the socket set.
• Use a multimeter to test the coil for resistance; compare readings to manufacturer specifications.
• If faulty, replace with a new ignition coil.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner kit.
• Remove the fuel rail to access the fuel injector for cylinder 2.
• Inspect the injector for clogs or damage.
• If dirty, use a fuel injector cleaner to clean it, or replace the injector if it’s faulty.
• Reinstall the fuel rail and ensure all connections are secure.

5. Perform a Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine a few times to get a reading.
• Compare the compression reading to manufacturer specifications (typically around 135-175 psi).
• If readings are low, further inspection of valve seals or piston rings may be necessary.