how to fix P0302 code on Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

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

2. Replace Spark Plug and Ignition Coil

1. Remove Engine Cover (if applicable)

   • Use a socket set to remove bolts securing the engine cover.
   • Carefully lift off the cover and set it aside.

2. Access Cylinder 2 Components

   • Locate the ignition coil and spark plug for cylinder 2 (refer to the vehicle manual for exact location).

3. Remove Ignition Coil

   • Disconnect the electrical connector from the ignition coil.
   • Remove the bolts securing the ignition coil using a socket wrench.
   • Gently pull the ignition coil out of the spark plug well.

4. Replace Spark Plug

   • Use a spark plug socket to remove the old spark plug.
   • Inspect the old spark plug for signs of wear or fouling.
   • Install a new spark plug, ensuring it is gapped correctly according to manufacturer specifications.
   • Torque the spark plug to the recommended value (usually around 13-15 ft-lbs).

5. Install New Ignition Coil

   • Place the new ignition coil over the spark plug and secure it with bolts.
   • Reconnect the electrical connector to the ignition coil.

3. Inspect and Replace Fuel Injector (if necessary)

1. Remove Fuel Injector Connector

   • Carefully disconnect the electrical connector from the fuel injector at cylinder 2.

2. Remove Fuel Injector

   • Detach any retaining clips and use an appropriate tool to remove the fuel injector.
   • Inspect the O-rings for damage and replace if necessary.

3. Install New Fuel Injector

   • Lubricate the new O-rings with engine oil.
   • Insert the new fuel injector into its place and secure it with clips or bolts.
   • Reconnect the electrical connector.

4. Final Steps

• Reinstall any engine covers removed during the process.
• Reconnect the negative battery terminal.
• Start the engine and allow it to idle for a few minutes to ensure everything is functioning correctly.