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

Solution

1. Preparation

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

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the spark plug wire or ignition coil from cylinder 2.
• Use the spark plug socket to unscrew and remove the old spark plug.
• Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug and tighten to the manufacturer's torque specification (typically around 13-16 lb-ft).
• Reconnect the ignition coil or spark plug wire.

3. Inspect and Replace Ignition Coil

• Tools Required: Ratchet, socket set.
• Remove the ignition coil from cylinder 2 by unscrewing the mounting bolts.
• Inspect the ignition coil for cracks or damage.
• If faulty, install a new ignition coil and secure it with bolts.
• Reconnect the electrical connector to the ignition coil.

4. Clean or Replace Fuel Injector

• Tools Required: Fuel injector puller (if necessary), cleaning solvent or new fuel injector.
• Disconnect the fuel injector wiring harness and fuel line (be cautious of fuel spillage).
• Remove the fuel injector from cylinder 2.
• If cleaning, use a fuel injector cleaning solvent; if replacing, install the new fuel injector.
• Reattach the fuel line and wiring harness.

5. Check Compression

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2.
• Screw in the compression tester and crank the engine to take a reading.
• Compare the compression value to the manufacturer's specification (usually around 180 psi).
• If compression is low, further diagnosis may be required for potential internal engine issues.