what does the P0302 code mean for my Toyota Highlander Third Generation (2014-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to avoid electrical shorts.
• Allow the engine to cool before beginning work.

2. Inspect and Replace Spark Plug

1. Remove the engine cover if applicable.
2. Locate cylinder 2 spark plug (refer to the owner's manual for location).
3. Use a spark plug socket and ratchet to remove the spark plug.
4. Inspect the spark plug for wear or fouling; replace it if necessary with the correct type (typically NGK or Denso specific to model).
5. Gap the new spark plug according to specifications (usually around 0.044 inches).
6. Reinstall the spark plug and tighten to manufacturer specifications (approx. 13 lb-ft).

3. Check and Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil on cylinder 2.
2. Remove the bolts securing the ignition coil and carefully pull it out.
3. Inspect for cracks or damage; replace if necessary.
4. Install the new ignition coil and secure it with bolts to manufacturer specifications.
5. Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector

1. Disconnect the fuel injector connector for cylinder 2.
2. Remove the fuel rail if necessary to access the injector.
3. Remove the old fuel injector and replace with a new one (ensure it is compatible with the Highlander).
4. Reinstall the fuel rail and reconnect the injector connector.

5. Perform Compression Test

1. Remove spark plugs from all cylinders for easier access.
2. Insert compression gauge into cylinder 2 spark plug hole.
3. Crank the engine for several revolutions and record the reading.
4. Compare the reading to manufacturer specifications (typically around 150-200 psi).
5. If low, further diagnostics may be needed for internal engine issues (e.g., valve or piston problems).