how to diagnose P0302 code on Toyota Camry XV50 (2012-2017)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal.
• Ensure the engine is cool before beginning work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench
• Remove the ignition coil cover (if applicable).
• Disconnect the electrical connector from the ignition coil of cylinder 2.
• Remove the ignition coil using the appropriate socket.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear or damage and replace if necessary.
• Torque the new spark plug to the manufacturer’s specifications (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, multimeter
• If the ignition coil was found to be faulty, remove it as described in the previous step.
• Test the ignition coil with a multimeter to check for proper resistance (refer to the service manual for specifications).
• Replace the ignition coil if it does not meet specifications.
• Reinstall the ignition coil and ensure proper connection.

4. Check Fuel Injector

• Tools Required: Noid light or multimeter
• Remove the connector from the fuel injector on cylinder 2.
• Use a noid light or multimeter to test for power and ground at the injector connector while cranking the engine.
• If there is no signal, trace the wiring back to the engine control module.
• If the injector is faulty, replace it using the following steps:
  • Disconnect the fuel line (use caution as fuel may spray).
  • Remove the injector retaining clips and pull the injector out.
  • Install the new injector, ensuring it seats properly, and reattach the clips.
  • Reconnect the fuel line.

5. Final Checks

• Reconnect the negative battery terminal.
• Clear the DTCs using the OBD-II scanner.
• Start the engine and observe for smooth operation.