how to diagnose the P0302 code on my Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the spark plug from cylinder 2 using the spark plug socket.
• Inspect the spark plug for signs of fouling or wear. Replace it if necessary.
• Install the new spark plug and torque it to the manufacturer's specification (typically 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set.
• Remove the ignition coil from cylinder 2 by unbolting it and disconnecting the electrical connector.
• Inspect the ignition coil for cracks or damage. Replace if faulty.
• Install the new ignition coil, ensuring a secure fit and reconnecting the electrical connector.

4. Test Fuel Injector

• Tools Required: Fuel injector tester or noid light.
• Disconnect the fuel injector connector for cylinder 2.
• Connect the noid light to the injector harness to check for signal. If no signal, inspect wiring and ECM.
• If the fuel injector is faulty, replace it by removing the fuel rail (if necessary) and installing a new injector.

5. Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 2 and install the compression gauge.
• Crank the engine and record the compression reading. Compare to manufacturer specifications.
• If compression is low, further investigation is required (e.g., valve seals, piston rings).