how to resolve P0302 misfire code in Toyota Camry XV70 (2018-2024)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before proceeding with repairs.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, ratchet, spark plug socket, multimeter.
• Remove the engine cover (if applicable) by loosening the bolts.
• Disconnect the ignition coil connector for cylinder 2 and remove the coil by unscrewing it.
• Inspect the coil for damage or carbon tracking. Replace it if necessary.
• Remove the spark plug from cylinder 2 using a spark plug socket and inspect it for wear or fouling.
  • If the spark plug is worn or damaged, replace it with a new one, ensuring proper gap specifications as per the manufacturer’s recommendations.
• Reinstall the ignition coil and connector.

3. Inspect and Test Fuel Injector

• Tools Required: Noid light or multimeter, fuel injector cleaning kit.
• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check for signal at the injector connector when the engine is cranked. If no signal is present, trace wiring back to the ECM.
• If the injector is not firing, replace the fuel injector for cylinder 2.
• If the injector fires but is clogged, consider using a fuel injector cleaning kit or replacing the injector.

4. Perform Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 2 and install the compression gauge.
• Crank the engine several times and note the compression readings.
• If compression is below the manufacturer’s specifications, further engine diagnosis may be required for valve or piston issues.