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

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the battery to ensure safety.

Tools Required:

• OBD-II scanner
• Socket set
• Torque wrench
• Multimeter
• Compression tester
• Noid light

2. Spark Plug Replacement

• Remove the ignition coil from cylinder 2 by unbolting it and disconnecting the electrical connector.
• Unscrew and remove the spark plug from cylinder 2 using a socket wrench.
• Inspect the old spark plug to determine if it needs replacement due to fouling or wear.
• Install a new spark plug, ensuring it's gapped according to manufacturer specifications (typically around 0.043 inches).
• Torque the spark plug to the manufacturer’s specifications (usually around 13 lb-ft).

3. Ignition Coil Inspection and Replacement

• If the spark plug is in good condition, test the ignition coil's resistance with a multimeter.
• If the coil is faulty, replace it with a new one.
• Reconnect the ignition coil and ensure it is securely mounted.

4. Fuel Injector Testing

• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check for proper signal to the injector. If there's no signal, further diagnose the wiring.
• If the injector is suspected to be faulty, replace it with a new one.

5. Compression Test

• Remove the spark plug from cylinder 2 and perform a compression test using a compression tester.
• If compression is low, investigate further for potential issues such as a faulty head gasket, valve problems, or piston damage.

6. Final Assembly and Testing

• Reinstall all components removed during the diagnosis and repair process.
• Reconnect the battery.
• Clear the codes using the OBD-II scanner.