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

Solution

1. Preparation

• Gather tools and parts required for repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery's negative terminal for safety.

2. Replace Ignition Coil

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove the engine cover if applicable.
• Unplug the electrical connector from the ignition coil of cylinder 2.
• Remove the retaining bolts using a socket set.
• Carefully lift out the ignition coil.
• Install the new ignition coil and torque the bolts to manufacturer's specifications.
• Apply dielectric grease to the connector before plugging it back in.

3. Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, gap tool.
• Remove the ignition coil if it was not previously done.
• Use a spark plug socket to remove the spark plug from cylinder 2.
• Inspect the old spark plug for wear and gap specification.
• Install a new spark plug, ensuring it is gapped correctly per manufacturer specifications.
• Torque the new spark plug to the recommended value (usually around 13 ft-lbs).

4. Inspect/Replace Fuel Injector

• Tools Required: Fuel line removal tool, socket set.
• Disconnect the fuel line from the fuel injector (be cautious of fuel spray).
• Remove the electrical connector from the fuel injector.
• Unbolt and remove the fuel injector from the intake manifold.
• If necessary, replace the fuel injector with a new one.
• Reassemble the connector and fuel line, ensuring no leaks.