how to fix P0302 code in Toyota Corolla E170 (2013-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface with the engine off and cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 2 by unscrewing it and disconnecting the electrical connector.
• Remove the spark plug from cylinder 2 using a spark plug socket.
• Inspect the old spark plug; replace it if worn or damaged.
• Install the new spark plug and tighten it to the manufacturer’s specified torque (typically 13-15 lb-ft).
• Apply dielectric grease to the inside of the ignition coil boot before reinstalling.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set.
• If the spark plug is in good condition, check the ignition coil for cylinder 2.
• Remove the ignition coil from cylinder 2.
• Test the ignition coil with a multimeter (check resistance as per specifications).
• If the coil is faulty, replace it with a new one.
• Reinstall the ignition coil and ensure it is securely fastened.

4. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit (if applicable).
• If symptoms persist, remove the fuel injector for cylinder 2.
• Inspect for clogging or damage.
• Clean the injector using a fuel injector cleaning kit or replace it if necessary.
• Reinstall the injector ensuring proper alignment and sealing.

5. Conduct Compression Test

• Tools Required: Compression gauge.
• Remove the spark plugs for all cylinders to allow for accurate testing.
• Insert the compression gauge into the spark plug hole for cylinder 2.
• Crank the engine to get a reading and compare it with the manufacturer’s specifications (typically around 180 psi).
• If compression is low, further investigation into engine internals may be necessary.