how to fix P0302 code in Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

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

2. Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connector for cylinder 2.
3. Unscrew the ignition coil from the cylinder head using a socket wrench.
4. Remove the existing spark plug using a spark plug socket.
5. Inspect the spark plug gap and condition; replace if necessary with a new spark plug, ensuring the gap is set to manufacturer specifications (typically around 0.043 inches for a Toyota Camry).
6. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if needed)

1. If the ignition coil is found faulty during the diagnostic steps, remove it following the steps above.
2. Install a new ignition coil onto the spark plug and secure it with the bolt.
3. Reconnect the ignition coil electrical connector.

4. Test Fuel Injector

1. Use a fuel injector tester to check the operation of the fuel injector for cylinder 2.
2. If the injector is faulty, remove it using appropriate tools (usually a fuel rail removal tool).
3. Replace with a new fuel injector and ensure proper sealing.

5. Compression Test (if applicable)

1. Remove the spark plug for cylinder 2 again to gain access.
2. Install a compression gauge into the spark plug hole.
3. Crank the engine a few times to get a reading. A healthy cylinder should show compression within the manufacturer's specified range (usually around 180-200 psi).
4. If compression is low, further internal engine diagnosis may be needed.