how to fix the P0302 code on my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to avoid electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector from cylinder 2.
• Remove the ignition coil and inspect the spark plug.
• If the spark plug is worn or fouled, replace it with a new one, ensuring it is properly gapped (refer to specifications).
• Reinstall the ignition coil, ensuring it is securely connected.

3. Check and Replace Ignition Coil

• If the spark plug is fine, test the ignition coil for proper resistance using a multimeter.
• If it's out of specification, replace the ignition coil with a new one.
• Reinstall the ignition coil and connect the plug.

4. Inspect and Replace Fuel Injector

• Use a noid light to check the signal to the fuel injector for cylinder 2.
• If there is no signal, inspect the wiring and connectors. Repair if necessary.
• If the injector is faulty, remove it using a fuel line disconnect tool.
• Replace with a new fuel injector and ensure proper installation.

5. Compression Test

• Remove the spark plug from cylinder 2.
• Insert a compression gauge and crank the engine to measure compression.
• If compression is below specified limits, further investigation into internal engine components may be necessary (e.g., valve issues, head gasket leaks).

6. Reassemble and Final Checks

• Reinstall the spark plug, ignition coil, and any covers removed.
• Reconnect the battery terminal.
• Clear the P0302 code from the OBD-II scanner.