how to fix P0303 misfire code in Tesla Outback 4th Generation (2010-2014)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shocks.

2. Inspect and Replace Spark Plug

• Remove the engine cover if necessary.
• Locate the spark plug for cylinder 3.
• Using a spark plug socket, remove the spark plug.
• Inspect the spark plug for wear, carbon buildup, or damage. Replace if necessary.
• Torque the new spark plug to the manufacturer’s specification (typically around 13-18 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil bolt and carefully pull out the coil.
• Inspect the coil for cracks or damage and replace if needed.
• Install the new ignition coil, securing it with the bolt and reconnecting the electrical connector.

4. Check and Clean Fuel Injector

• Locate the fuel injector for cylinder 3 and disconnect the electrical connector.
• Remove any retaining clips or bolts securing the fuel rail.
• Carefully pull the fuel injector out of the rail.
• Inspect the injector tip for clogs or debris. Clean or replace the injector if necessary.
• Reinstall the fuel injector and secure the fuel rail back in place.

5. Perform Compression Test

• Remove the spark plug from cylinder 3.
• Insert the compression tester into the spark plug hole.
• Crank the engine for a few seconds to get a reading.
• Compare the reading with the manufacturer's specifications. If low, further inspection of the cylinder may be needed.