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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative terminal of the battery to ensure safety.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector from cylinder 2.
• Remove the ignition coil by unscrewing the mounting bolts.
• Use a spark plug socket to remove the old spark plug from cylinder 2.
• Install a new spark plug, ensuring it is gapped to manufacturer specifications (generally around 0.043 inches).
• Torque the spark plug to the manufacturer’s specification (usually around 13-16 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if needed)

• If the ignition coil was found to be faulty during diagnostics:
  • Remove the ignition coil as described above.
  • Install the new ignition coil and secure it with bolts.
  • Reconnect the ignition coil connector.

4. Inspect/Replace Fuel Injector (if needed)

• If the fuel injector is faulty:
  • Remove any components obstructing access to the fuel injector.
  • Disconnect the fuel injector connector.
  • Remove the fuel rail (if applicable) to access the injector.
  • Replace the faulty fuel injector with a new one and reassemble any removed components.

5. Final Assembly

• Reinstall any components that were removed for access.
• Reconnect the negative battery terminal.