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

Solution

1. Preparation

• Tools Required: OBD-II scanner, spark plug socket, multimeter, compression tester, basic hand tools.
• Park the vehicle on a level surface and engage the parking brake. Disconnect the battery negative terminal.

2. Replace Spark Plug (if faulty)

1. Remove the engine cover if necessary.
2. Use a spark plug socket to remove the spark plug from cylinder 2.
3. Inspect the spark plug for damage or wear. Replace it if necessary with the recommended type and gap.
4. Install the new spark plug and torque it to manufacturer specifications (typically around 13 lb-ft for most Toyota applications).

3. Replace Ignition Coil (if faulty)

1. Disconnect the electrical connector from the ignition coil on cylinder 2.
2. Remove the ignition coil by unscrewing the retaining bolts.
3. Install the new ignition coil and secure it with bolts. Reconnect the electrical connector.
4. Ensure the coil properly fits and is seated in the spark plug well.

4. Clean or Replace Fuel Injector (if clogged)

1. If the fuel injector is faulty, remove the fuel rail assembly according to the manufacturer's procedure.
2. Disconnect the fuel line and electrical connector from the injector on cylinder 2.
3. Remove the injector from the rail and clean it using an injector cleaner or replace it with a new injector.
4. Reinstall the fuel injector and secure everything back in place.

5. Compression Test (if mechanical failure is suspected)

1. Remove the spark plug from cylinder 2.
2. Insert the compression tester into the spark plug hole.
3. Crank the engine for a few seconds and record the compression reading.
4. Repeat for other cylinders for comparison. If the compression is low, further investigation into internal engine components may be necessary.