how to fix P0301 code in my Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  1. Disconnect the electrical connector.
  2. Remove the retaining bolt using a socket set.
  3. Carefully pull the coil out of the spark plug well.
• Remove the spark plug:
  1. Use a spark plug socket and ratchet to unscrew the spark plug.
  2. Inspect the spark plug for damage, wear, or carbon buildup.
• Install a new spark plug:
  1. Apply anti-seize lubricant on the threads (optional).
  2. Torque the new spark plug to the manufacturer's specification (typically around 13-15 lb-ft).
• Reinstall the ignition coil:
  1. Position the coil over the new spark plug and press down firmly.
  2. Secure with the retaining bolt and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil appears damaged or faulty:
  1. Remove the coil as previously described.
  2. Install a new ignition coil in the same manner.

4. Check and Replace Fuel Injector (if necessary)

• If the injector is faulty:
  1. Disconnect the fuel line and electrical connector from the injector.
  2. Remove the injector from the rail.
  3. Install a new fuel injector, ensuring proper sealing.
  4. Reconnect the fuel line and electrical connector securely.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0301 code from the engine control module (ECM).