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

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative terminal of the battery to ensure safety during the repair.
• Allow the engine to cool before starting work.

2. Replace Spark Plug

1. Remove the ignition coil from cylinder 2 by unscrewing the mounting bolts and gently pulling it out.
2. Use a spark plug socket to remove the spark plug from cylinder 2.
3. Inspect the old spark plug for signs of wear and replace it with a new spark plug, ensuring it is gapped to the manufacturer specifications (usually 0.043 inches for Toyota engines).
4. Reinstall the ignition coil onto the new spark plug and secure it with the bolts.

3. Test Fuel Injector

1. Disconnect the fuel injector connector for cylinder 2.
2. Use a multimeter to check the resistance of the fuel injector; it should match the specifications in the service manual (typically around 12-16 ohms).
3. If the resistance is out of range, replace the fuel injector.
4. If the injector is functional, clean it using a fuel injector cleaning kit, following the manufacturer's instructions.

4. Check Compression

1. Remove the spark plug from cylinder 2 again, if not already done.
2. Insert a compression gauge into the spark plug hole.
3. Crank the engine to take a reading. The compression should be within the specifications outlined in the service manual (usually around 180 psi).
4. If the compression is low, further investigation is needed, which may involve checking for valve issues or head gasket leaks.