how to fix P0303 code in Toyota RAV4 XA40 (2013-2018)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench
• Remove the engine cover if necessary.
• Use a socket to remove the spark plug from cylinder 3.
• Inspect the old spark plug for wear or damage.
• Install a new spark plug, ensuring it is gapped correctly (consult manufacturer specifications).
• Torque the spark plug to the specified value (usually around 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter
• Disconnect the ignition coil connector.
• Remove the ignition coil from cylinder 3.
• Test the ignition coil with a multimeter for proper resistance (consult specifications).
• If faulty, replace it with a new ignition coil.
• Reinstall the ignition coil and reconnect the connector.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge (if needed), basic hand tools
• Disconnect the fuel injector connector.
• Use a multimeter to test the injector's resistance (check specifications for acceptable range).
• If the fuel injector is faulty, remove it from the engine and replace it with a new one.
• Reconnect the fuel injector and ensure it is seated properly.

5. Clear Codes and Test Drive

• Reconnect the negative battery terminal.
• Use an OBD-II scanner to clear the P0303 code.
• Start the engine and conduct a test drive to ensure the issue has been resolved.