how to fix P0302 code in Toyota Corolla E170 (2013-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

1. Remove the engine cover if applicable.
2. Use a socket wrench to remove the spark plug from cylinder 2.
3. Inspect the old spark plug for wear (carbon buildup, cracks) and replace it if necessary.
4. Apply a small amount of anti-seize compound to the threads of the new spark plug.
5. Torque the new spark plug to the manufacturer's specifications (typically around 13 ft-lbs).
6. Reinstall the engine cover.

3. Check/Replace Ignition Coil

1. Disconnect the electrical connector from the ignition coil for cylinder 2.
2. Remove the coil by unbolting it and pulling it straight out.
3. Test the coil's primary and secondary resistance with a multimeter; replace if out of specification.
4. Install the new or tested ignition coil and reconnect the electrical connector.

4. Inspect/Replace Fuel Injector

1. Remove any components blocking access to the fuel injector if necessary (like the intake plenum).
2. Disconnect the fuel injector connector and remove the injector.
3. Inspect the injector for clogs; clean or replace as necessary.
4. Reinstall the fuel injector ensuring proper sealing and reconnect the electrical connector.

5. Compression Test (if mechanical issues suspected)

1. Remove the spark plug from cylinder 2.
2. Insert the compression gauge into the spark plug hole.
3. Crank the engine and take the reading. Compare it to manufacturer specifications.
4. If compression is low, further engine diagnostics may be necessary.