how to fix P0302 code in my Toyota Highlander Third Generation (2014-2019)

Solution

1. Preparation

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

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 2 by unscrewing the bolts and gently pulling it off.
• Remove the spark plug using the spark plug socket.
• Inspect the old spark plug for wear; replace it with a new one, ensuring it is gapped correctly.
• Apply a small amount of dielectric grease to the spark plug threads before installation.
• Reinstall the ignition coil and secure it with bolts.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil was found to be faulty during diagnostics:
  • Remove the ignition coil from the vehicle.
  • Install a new ignition coil in the same location.
  • Ensure it is seated correctly and reattach the connector.

4. Inspect and Replace Fuel Injector (if necessary)

• If the fuel injector was found to be faulty:
  • Remove the fuel rail to access the injector for cylinder 2.
  • Disconnect the fuel line and electrical connector from the injector.
  • Remove the injector from the rail and replace it with a new one.
  • Reinstall the fuel rail and reconnect the fuel line and electrical connectors.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0302 code from the system.