how to fix P0302 misfire code in Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather tools and parts for repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove the ignition coil from cylinder 2 by unfastening the retaining bolt and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear and deposits; replace it if necessary, ensuring the gap is within specifications (typically 0.043 inches).
• Apply dielectric grease to the ignition coil's boot before reinstallation.

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, test the ignition coil with a multimeter (check primary and secondary resistance).
• If the coil fails the test, replace it with a new OEM or equivalent part.
• Reinstall the ignition coil and ensure it is properly seated.

4. Inspecting and Testing Fuel Injector

• Tools Required: Fuel injector tester.
• Disconnect the fuel injector connector for cylinder 2.
• Use a fuel injector tester to check if the injector is firing correctly.
• If the injector is faulty, replace it and ensure all connections are secure.

5. Compression Test

• Tools Required: Compression gauge.
• Remove the ignition coil and spark plug from cylinder 2.
• Insert the compression gauge into the spark plug hole and crank the engine to check the pressure.
• Compare the reading to manufacturer specifications; if low, further inspection of internal engine components may be necessary.