how to fix P0300 code in Tesla Outback 4th Generation (2010-2014)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to prevent electrical shocks.

2. Inspect and Replace Spark Plugs

• Remove the engine cover (if applicable) and locate the spark plugs.
• Use a socket wrench to remove the spark plugs.
• Inspect the condition of each spark plug; replace if worn or fouled.
• Install new spark plugs, ensuring they are gapped correctly (typically 0.044 inches for Subaru).
• Torque spark plugs to the manufacturer-specified value (usually around 13-15 ft-lbs).

3. Test and Replace Ignition Coils

• Disconnect the electrical connector from each ignition coil.
• Remove the ignition coil bolts using a socket set.
• Test each ignition coil using a multimeter; look for resistance within the specified range (consult service manual for values).
• Replace faulty ignition coils with new ones; ensure to torque bolts to specifications.

4. Clean Fuel Injectors

• Remove the fuel rail to access the fuel injectors.
• Carefully disconnect the fuel lines (use a fuel pressure gauge to relieve pressure beforehand).
• Use a fuel injector cleaning kit or professional service to clean the injectors.
• Reinstall the fuel injectors and fuel rail, ensuring all connections are secure.

5. Check for Vacuum Leaks

• Inspect all vacuum hoses and connections for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to identify leaks.
• Replace any damaged hoses or seals.