how to fix P0302 misfire code on my Toyota Corolla E140 (2006-2013)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Remove Ignition Components

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the electrical connector from the ignition coil in cylinder 2.
3. Remove the ignition coil by unscrewing the mounting bolt and gently pulling it out.
4. Remove the spark plug using a spark plug socket and ratchet.

3. Inspect and Replace

1. Inspect Spark Plug:
   • Examine the spark plug for signs of wear, such as carbon buildup, oil fouling, or damaged electrodes.
   • If damaged, replace the spark plug with the manufacturer's recommended type (typically NGK or Denso).
2. Inspect Ignition Coil:
   • Test the ignition coil using a multimeter to check for proper resistance. If it’s outside the manufacturer's specifications, replace it.
3. Check Fuel Injector:
   • Use a noid light or multimeter to test for proper operation of the fuel injector in cylinder 2. If faulty, replace the fuel injector.

4. Reassemble Components

1. Install the new spark plug, tightening to the manufacturer’s specified torque (usually around 13-16 ft-lbs).
2. Install the ignition coil back into position and secure with the bolt.
3. Reconnect the electrical connector to the ignition coil.
4. Reinstall the engine cover if applicable.

5. Final Checks

• Reconnect the negative battery terminal.
• Clear the error codes using the OBD-II scanner.