why does my Toyota Corolla E210 (2019-2024) have a check engine light with P0302 code

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, fuel injector cleaner.
• Wear safety goggles and gloves.

2. Replace Spark Plug

1. Remove Engine Cover (if applicable)
   • Use a socket set to remove bolts securing the engine cover.
2. Disconnect Ignition Coil
   • Unplug the electrical connector from the ignition coil.
3. Remove Spark Plug
   • Use a spark plug socket to unscrew and remove the spark plug from cylinder 2.
4. Install New Spark Plug
   • Apply anti-seize compound to the threads of the new spark plug.
   • Torque to manufacturer's specifications (typically around 13-16 lb-ft).
5. Reconnect Ignition Coil
   • Plug the ignition coil back into place.

3. Replace Ignition Coil (if necessary)

1. Remove Ignition Coil
   • Unscrew the bolts securing the ignition coil to the engine.
2. Install New Ignition Coil
   • Position the new ignition coil in place and secure with bolts to manufacturer torque specifications.

4. Clean or Replace Fuel Injector (if necessary)

1. Access Fuel Injector
   • Remove any components obstructing access to the fuel injector (e.g., fuel rail).
2. Inspect Fuel Injector
   • Check for clogs; clean with fuel injector cleaner or replace if necessary.
3. Reassemble Components
   • Reattach any components removed during access, ensuring proper fitment.

5. Perform Compression Test (if misfire persists)

1. Remove Spark Plug Again
   • Unscrew the spark plug from cylinder 2.
2. Insert Compression Tester
   • Install the compression tester into the spark plug hole.
3. Crank Engine
   • Crank the engine to check compression readings; compare with manufacturer specifications.
4. Document Results
   • If compression is low, further diagnostics are required.