how to diagnose a misfire in Tesla Outback 5th Generation (2015-2019) with code P0302

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Remove the ignition coil for cylinder 2 by unscrewing the mounting bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket and ratchet.
• Inspect the old spark plug for signs of wear or fouling; compare it to manufacturer specifications.
• Install the new spark plug, ensuring the gap is set according to specifications.
• Torque the spark plug to the manufacturer-recommended specification (typically around 13-15 ft-lbs).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• If the ignition coil showed signs of damage or malfunction during inspection, proceed to replace it.
• Remove the faulty ignition coil.
• Install the new ignition coil and ensure it is seated correctly.
• Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

• If the injector was tested and found to be faulty, remove the intake manifold if required to access the fuel injector.
• Disconnect the fuel line and electrical connector from the injector.
• Remove the retaining clip and pull out the injector.
• Install the new injector, ensuring proper orientation.
• Reconnect the fuel line and electrical connector.

5. Reassemble and Test

• Reinstall any components removed during the repair, including the engine cover.
• Reconnect the negative battery terminal.
• Start the engine and allow it to idle while checking for any abnormal sounds.