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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level 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, spark plug socket.
• Remove the ignition coil from cylinder 2:
  • Unplug the electrical connector.
  • Remove the mounting bolts and lift the coil out.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear or damage. Replace if necessary.
• Install the new spark plug:
  • Torque to the manufacturer’s specification (usually around 13-16 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Test Fuel Injector

• Tools Required: Fuel injector tester.
• Disconnect the fuel injector connector for cylinder 2.
• Use the fuel injector tester to check for proper operation.
• If the injector is faulty, replace it with a new one:
  • Remove the injector and replace it with the new injector, ensuring O-rings are lubricated and seated properly.

4. Compression Test (if needed)

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 2.
• Insert the compression gauge into the spark plug hole.
• Crank the engine for a few seconds and record the reading.
• Compare it with manufacturer specifications. If low, further diagnosis of engine internals may be needed.

5. Inspect for Vacuum Leaks

• Tools Required: Smoke machine (optional) or visual inspection tools.
• Inspect all vacuum hoses connected to the intake manifold.
• Use a smoke machine to detect leaks if available. Repair any damaged hoses or connections.