how to resolve the P0303 misfire code on Tesla Outback 5th Generation (2015-2019)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle battery to prevent electrical shock.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder three.
• Remove the ignition coil (unbolt and lift out).
• Remove the old spark plug using a spark plug socket.
• Inspect the spark plug hole for debris.
• Install the new spark plug, ensuring it is gapped correctly (typically 0.044 inches for most applications).
• Tighten the spark plug to the manufacturer's specified torque (usually around 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

• If the ignition coil was found to be faulty, remove it as described in the previous step.
• Install the new ignition coil in the reverse order of removal.
• Ensure connections are secure.

4. Clean or Replace Fuel Injector (if necessary)

• If the fuel injector is clogged, it may need to be cleaned using a fuel injector cleaning kit or replaced.
• Disconnect the fuel injector connector.
• Remove the fuel rail (if applicable) to access the injector.
• Remove the old fuel injector and install the new one, ensuring O-rings are lubricated and seated properly.
• Reconnect the fuel injector connector.

5. Final Assembly

• Reinstall any components removed for access (such as the engine cover).
• Reconnect the vehicle battery.