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

Solution

1. Preparation

• Gather necessary tools and materials.
• Disconnect the battery to prevent electrical shock.
• Ensure the engine is cool before starting work.

2. Replace Spark Plug

1. Remove the ignition coil for cylinder 2 by unscrewing the retaining bolts and gently pulling it out.
   • Tools Required: Socket set
2. Remove the spark plug using a spark plug socket and ratchet.
3. Inspect the old spark plug and compare it to manufacturer specifications. Install a new spark plug if necessary.
   • Torque Specification: 13-16 lb-ft (18-22 Nm) for the spark plug.
4. Reinstall the ignition coil and secure it back in place.

3. Replace Ignition Coil (if needed)

1. If the ignition coil is faulty, remove it as outlined in step 2.
2. Install a new ignition coil for cylinder 2 and ensure it is properly seated.
   • Tools Required: Socket set
3. Reconnect the electrical connector to the ignition coil.

4. Fuel Injector Inspection/Replacement (if needed)

1. If the injector is suspected faulty, disconnect the fuel line and electrical connector.
   • Safety Warning: Relieve fuel pressure before disconnecting the fuel line to avoid spraying fuel.
2. Remove the fuel injector from the rail by unclipping it or unscrewing it.
3. Replace with a new fuel injector if necessary and reassemble the fuel rail.