how to fix P0302 code in Toyota Corolla E140 (2006-2013)

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 2 by unscrewing the mounting bolt and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket. Inspect the old spark plug; if it is fouled or damaged, replace it.
• Install the new spark plug with a torque specification of 13 lb-ft (18 Nm).
• Apply dielectric grease to the boot of the ignition coil before reinstallation.

3. Replace Ignition Coil (if necessary)

• If the ignition coil was found faulty during diagnostics, replace it.
• Tools Required: Socket set.
• Remove the existing ignition coil by unbolting it and disconnecting the connector.
• Install the new ignition coil and reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

• If the fuel injector for cylinder 2 is suspected to be clogged or malfunctioning, it may need cleaning or replacement.
• Tools Required: Fuel injector removal tool, fuel line disconnect tool.
• Relieve fuel pressure from the fuel system by removing the fuel pump relay and starting the engine until it stalls. Then disconnect the negative battery terminal.
• Disconnect the fuel lines and electrical connector from the fuel injector.
• Remove the fuel injector and clean it with an appropriate injector cleaner or replace it with a new injector.