how do I fix the P0301 code in my Toyota RAV4 Fifth Generation (2019-present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil by unscrewing the bolts and gently pulling it out.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear, carbon deposits, or damage. Replace if necessary.
• Install a new spark plug, ensuring it is gapped correctly (consult specifications for gap size).
• Torque the spark plug to manufacturer specifications.

3. Inspect and Replace Ignition Coil

• Remove the ignition coil from cylinder 1.
• Inspect the coil for cracks or signs of damage.
• Replace the ignition coil with a new one if it is defective.
• Reinstall the coil and ensure all connectors are secure.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaner
• Disconnect the fuel injector connector.
• Measure the resistance of the fuel injector using a multimeter. Compare to specifications; replace if out of range.
• If injector is functional, clean it with an appropriate injector cleaner before reinstalling.

5. Perform Final Checks

• Reconnect all components and ensure all connectors are tightly fitted.
• Reconnect the negative battery terminal.
• Clear the error codes using an OBD-II scanner.