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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a flat surface and the engine is cool.

2. Inspect and Replace Spark Plugs

• Tools Required: Socket set, torque wrench.
• Remove the ignition coils from cylinder 2.
• Remove the spark plug using a socket wrench.
• Inspect the spark plug for wear or deposits. Replace if necessary.
• If replacing, torque the new spark plug to manufacturer's specifications (typically 13-15 lb-ft).

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil for cylinder 2.
• Tools Required: Multimeter.
• Disconnect the ignition coil connector and remove it.
• Use a multimeter to check the primary and secondary resistance of the coil. Replace if values are out of specification.
• Install the new ignition coil and reconnect the connector.

4. Test Fuel Injector

• Use a noid light or a fuel injector tester to check the operation of the fuel injector on cylinder 2.
• If the injector is not functioning, remove it from the engine.
• Clean or replace the fuel injector as necessary.
• Reinstall the injector ensuring proper seating.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2 and install the compression tester.
• Crank the engine and record the compression reading. Compare with specifications.
• If the reading is low, further investigation into the engine internals may be needed (valves, head gasket).