how to fix a misfire code P0302 on my Toyota Corolla E210 (2019-2024)

Solution

1. Preparation

• Gather tools and safety equipment.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, gap gauge.
• Remove the ignition coil from cylinder 2.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or fouling; replace if necessary.
• Set the gap on the new spark plug to the manufacturer’s specification (typically 0.043 inches for Toyota).
• Install the new spark plug and torque it to the manufacturer’s specification (usually around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Ratchet and socket set.
• Remove the ignition coil from cylinder 2.
• Inspect the coil for cracks or damage and replace it if necessary.
• Install the new ignition coil and reconnect the electrical connector.

4. Test and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, noid light (if testing operation).
• If injector operation is faulty, remove the fuel injector from cylinder 2.
• Clean the injector using an appropriate fuel injector cleaner or replace it if malfunctioning.
• Reinstall the fuel injector and ensure it is seated properly.

5. Reassemble and Reconnect

• Reconnect the ignition coil and ensure all connectors are secure.
• Reconnect the battery.