how to fix misfire code P0302 on Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 2.
• Use the spark plug socket to remove the spark plug.
• Inspect the old spark plug; if damaged, replace it with a new one.
• Apply dielectric grease to the threads of the new spark plug and install it. Torque to manufacturer specifications (typically around 13-15 lb-ft).
• Reinstall the ignition coil securely.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil appears faulty during inspection or if the misfire persists, replace it.
• Tools Required: Socket set, torque wrench.
• Remove the ignition coil from cylinder 2.
• Install the new ignition coil, ensuring it is seated properly and secured with the appropriate torque (usually around 80-100 in-lbs).

4. Check and Clean Fuel Injector

• If the injector is clogged or malfunctioning, clean or replace it.
• Tools Required: Fuel injector cleaner, injector puller tool.
• Disconnect the fuel line and electrical connector from the injector.
• Remove the fuel injector using the injector puller tool.
• Clean the injector with appropriate fuel injector cleaner or replace it with a new one.
• Reinstall the injector, reconnect the fuel line and electrical connector.

5. Verify Engine Compression

• If the misfire continues after replacing spark plug and ignition coil, conduct a compression test.
• Tools Required: Compression gauge.
• Remove all spark plugs and install the compression gauge in cylinder 2.
• Crank the engine and record the compression reading; it should be within specifications (usually 180-220 psi).
• If compression is low, further engine diagnosis may be required.