how do I fix the misfire code P0302 on my Toyota Camry XV40 (2007-2011)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down.

2. Replace the Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil by unscrewing the retaining bolts and disconnect the electrical connector.
• Extract the spark plug using the spark plug socket.
• Inspect the old spark plug for signs of wear or fouling.
• Install a new spark plug (ensure it is gapped according to manufacturer specifications).
• Torque the spark plug to the specified value (typically around 13 lb-ft for most Toyota engines).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace the Ignition Coil (if necessary)

• If the ignition coil appears damaged or malfunctioning, replace it.
• Disconnect the electrical connector and remove the bolts securing the ignition coil.
• Install the new ignition coil and reconnect the electrical connector.

4. Check and Clean the Fuel Injector

• Tools Required: Fuel injector cleaner, cleaning kit (if applicable).
• If the fuel injector is clogged, remove it from the engine.
• Clean the injector using an appropriate fuel injector cleaning kit or replace it if necessary.
• Reinstall the cleaned or new fuel injector ensuring proper sealing.

5. Verify Engine Compression

• If compression is low in cylinder 2, further investigation is needed to identify underlying issues (e.g., piston rings, valves).
• Consult repair manuals for specifications and repair steps if compression is below the manufacturer's recommended levels.