how to fix P0302 code on my Toyota Camry XV40 (2007-2011)

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, multimeter, compression tester, fuel injector cleaner.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Locate the spark plug for cylinder 2 (usually the second cylinder from the front).
3. Use a socket and ratchet to remove the spark plug.
4. Inspect the spark plug for wear, carbon buildup, or damage.
5. If necessary, replace with a new spark plug, ensuring it is gapped correctly (usually around 0.043 inches).
6. Reinstall the spark plug and torque to the manufacturer’s specification (typically around 13 lb-ft).

3. Check and Replace Ignition Coil

1. Disconnect the ignition coil connector for cylinder 2.
2. Remove the ignition coil bolt using a socket wrench.
3. Pull the ignition coil out gently.
4. Test the ignition coil with a multimeter (should show resistance within the specified range).
5. If faulty, replace the ignition coil with a new one.
6. Reinstall the ignition coil and reconnect the connector.

4. Inspect and Clean Fuel Injector

1. Locate the fuel injector for cylinder 2.
2. Disconnect the fuel injector electrical connector.
3. Remove the fuel rail if needed (ensure to relieve fuel pressure first).
4. Inspect the injector for clogs or leaks.
5. Clean the injector using a fuel injector cleaner or replace it if necessary.
6. Reassemble all components and ensure all connections are secure.

5. Perform Compression Test (if needed)

1. Remove the spark plug from cylinder 2.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for a few seconds and note the reading.
4. Compare the reading to the specifications (typically around 180 psi).
5. If compression is low, further investigation is needed for internal engine problems.