what causes the P0302 code in my Toyota Corolla E210 (2019-2024)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool before beginning work.

2. Inspect and Replace Spark Plug

• Remove the ignition coil cover if applicable.
• Use a socket set to remove the spark plug from cylinder 2.
• Inspect the spark plug for wear or damage (replace if necessary).
• Check the spark plug gap and adjust it to the manufacturer's specification (typically 0.043 inches for Toyota).
• Install the new or cleaned spark plug and torque it to the manufacturer's specification (approximately 13 lb-ft).

3. Check and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil for cylinder 2.
• Remove the ignition coil using a socket set.
• Inspect the coil for cracks or damage (replace if necessary).
• Install the new ignition coil and reconnect the electrical connector.

4. Inspect and Test Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Use a multimeter to test the injector for resistance (should be within manufacturer specifications).
• If the injector is faulty, remove it and replace it with a new one.
• Reconnect the fuel injector connector.

5. Compression Test (if necessary)

• Remove all spark plugs for easier access.
• Insert a compression gauge into cylinder 2 and crank the engine.
• Compare the compression reading to manufacturer specifications (typically around 180 psi).
• If the reading is low, further investigation into engine mechanical issues may be required.