how to address the P0301 code in my Toyota RAV4 XA40 (2013-2018)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery for safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil for cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or damage. Replace if necessary.
• Install the new spark plug and torque it to the manufacturer's specification (typically around 13 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• If the spark plug appears fine, replace the ignition coil for cylinder 1.
• Remove the bolts securing the ignition coil and disconnect the electrical connector.
• Install the new ignition coil and secure it with the bolts, torquing to specification.

4. Check Fuel Injector

• Tools Required: Fuel injector tester or multimeter.
• Disconnect the fuel injector connector for cylinder 1.
• Use a fuel injector tester to check for proper operation. If it is faulty, replace the injector.
• Reconnect the fuel injector connector after testing or replacement.

5. Reassemble and Test

• Reconnect the ignition coil and any other components removed during the repair.
• Reconnect the negative terminal of the battery.
• Start the engine and monitor for any check engine light illumination.