how to fix P0302 misfire code in Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.
• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, compression tester, noid light.

2. Replace Spark Plug

• Remove the engine cover if applicable.
• Disconnect the ignition coil connector from cylinder 2.
• Remove the ignition coil using the appropriate socket.
• Remove the spark plug using a spark plug socket.
• Install a new spark plug to the manufacturer's specifications (typically 13-15 ft-lbs torque).
• Reinstall the ignition coil and reconnect the connector.

3. Test and Replace Ignition Coil (if necessary)

• Test the ignition coil's resistance using a multimeter. Check for the manufacturer's specified resistance range.
• If outside the range, replace the ignition coil with a new one.
• Reinstall the ignition coil and connector.

4. Inspect and Replace Fuel Injector (if necessary)

• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check for power to the injector; if there is no power, further diagnose the wiring or ECM.
• If the injector is not functioning, remove it using a fuel injector puller.
• Install a new fuel injector and ensure it is properly seated.

5. Perform Compression Test (if misfire persists)

• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole and crank the engine.
• Record the compression reading and compare it to specifications.
• If compression is low, investigate further for potential mechanical issues within the engine.