what does it mean if my Tesla Outback is showing a P0304 code?

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

Solution

1. Preparation

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

2. Replace Spark Plug

1. Remove the engine cover if necessary.
2. Locate spark plug for cylinder 4.
3. Use a socket wrench to remove the old spark plug.
4. Inspect the spark plug gap and replace with a new spark plug if damaged or worn.
5. Torque the new spark plug to the manufacturer's specifications (typically 12-15 lb-ft).

3. Replace Ignition Coil

1. Disconnect the wiring harness from the ignition coil on cylinder 4.
2. Remove the ignition coil by unscrewing it from the cylinder head.
3. Install the new ignition coil and secure it with screws.
4. Reconnect the wiring harness.

4. Inspect and Clean Fuel Injector

1. Remove the fuel rail if necessary to access the injector.
2. Detach the fuel injector connector.
3. Remove the fuel injector from the rail.
4. Clean the injector using a fuel injector cleaning kit or replace if necessary.
5. Reinstall the fuel injector and reattach the fuel rail.

5. Conduct Compression Test

1. Remove the spark plugs from all cylinders for accurate testing.
2. Insert the compression tester into the spark plug hole of cylinder 4.
3. Crank the engine and record the compression reading.
4. Compare the reading to manufacturer specifications; if low, further investigation may be needed.