how to fix P0302 cylinder 2 misfire code on Toyota Camry XV50 (2012-2017)

Solution

1. Preparation

• Gather tools and parts. 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 Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, multimeter (if testing coils).
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 2.
• Unbolt and remove the ignition coil from cylinder 2.
• Remove the spark plug from cylinder 2 using the spark plug socket.
• Inspect the spark plug for wear, carbon buildup, or damage. Replace it if necessary, using a new spark plug with the correct gap (typically 0.043 inches for this engine).
• Reinstall the ignition coil or replace it if defective. Use a multimeter to check the coil's resistance if needed (specifications found in service manual).
• Reconnect the ignition coil connector securely.

3. Inspect and Clean or Replace Fuel Injector

• Tools Required: Fuel injector removal tool (if needed), cleaning solvent, o-ring lubricant.
• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel rail if necessary to access the injector.
• Remove the injector from the fuel rail, checking for any debris or clogs.
• Clean the injector using a specialized fuel injector cleaner or replace it if cleaning does not resolve issues.
• Reinstall the injector, ensuring that new o-rings are used and properly lubricated to avoid damage.

4. Check Engine Compression

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 2 and insert the compression tester.
• Crank the engine several times to get a compression reading. Compare the reading to the manufacturer’s specifications.
• If the compression is low, investigate potential causes (valve issues, head gasket failure).

5. Reassemble and Final Checks

• Reinstall any components removed during the process.
• Reconnect the negative battery terminal.
• Clear the error codes from the vehicle’s ECU using the OBD-II scanner.