how to fix P0302 misfire code in Toyota Corolla E210 (2019-2024)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 2.
• Use a spark plug socket and ratchet to remove the old spark plug.
• Inspect the old spark plug's condition and gap.
• Install a new spark plug, ensuring it is gapped according to specifications (typically around 0.044 inches for this model).
• Torque the spark plug to the manufacturer’s specified value (usually around 13 ft-lbs).

3. Inspect and Replace Ignition Coil

• Locate the ignition coil for cylinder 2.
• Disconnect the electrical connector from the ignition coil.
• Remove the mounting bolts securing the ignition coil.
• Replace the ignition coil with a new one.
• Reconnect the electrical connector and ensure it clicks into place.

4. Check and Clean Fuel Injector

• Remove the fuel injector for cylinder 2 by disconnecting the electrical connector and removing the retaining clips.
• Inspect the injector for debris and clean it using a fuel injector cleaner or ultrasonic cleaner if necessary.
• Reinstall the cleaned or new injector, ensuring it is properly seated and secured.

5. Reassemble and Test

• Reinstall any components or covers that were removed.
• Reconnect the battery.
• Start the engine and observe for any misfire occurrences.