how to fix P0304 code in my Tesla Outback 6th Generation (2020-2024)

Learn how to diagnose and fix P0304 cylinder 4 misfire in Tesla Outback (2020-2024). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Ensure the engine is cool before starting any repairs.

2. Inspect and Replace Spark Plug

• Remove the ignition coil for cylinder 4.
  • Tools Required: Socket set (specific size for ignition coil), torque wrench.
• Inspect the spark plug for wear or damage.
• If necessary, replace the spark plug with a manufacturer-recommended part.
  • Torque the spark plug to the manufacturer's specifications (typically around 15-20 lb-ft).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil for cylinder 4.
• If faulty, remove the ignition coil.
  • Tools Required: Socket set, torque wrench.
• Install a new ignition coil and torque it to specifications (typically around 80 lb-in).

4. Check and Clean Fuel Injector

• Remove the fuel injector for cylinder 4.
  • Tools Required: Fuel injector removal tool, socket set.
• Inspect the fuel injector for clogs or damage.
• Clean the fuel injector using an appropriate cleaner or replace it if necessary.
• Reinstall the injector ensuring that O-rings are properly seated.

5. Test for Vacuum Leaks

• Inspect hoses and gaskets around the intake manifold for signs of wear or damage.
• Replace any damaged vacuum hoses.
• Reassemble any components removed during inspection.