how to fix P0302 misfire code in Toyota Camry Seventh Generation (2012-2017)

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter, fuel injector cleaner.
• Ensure the vehicle is parked on a flat surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Remove the ignition coil by unscrewing it from the cylinder head.
  3. Remove the spark plug using a spark plug socket.
  4. Inspect the spark plug for damage; replace it if worn.
  5. Install the new spark plug hand-tight, then torque it to the manufacturer specification (typically 13-15 ft-lbs).
  6. Reattach the ignition coil and secure it properly.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil is faulty, remove it from the cylinder head.
  2. Disconnect the electrical connector from the coil.
  3. Install the new ignition coil, ensuring it is seated correctly.
  4. Reconnect the electrical connector and secure the coil.

4. Check and Clean Fuel Injector (if necessary)

• Sub-steps:
  1. Remove the fuel injector rail (ensure fuel system pressure is relieved before doing this).
  2. Extract the fuel injector for cylinder 2.
  3. Clean the injector using a fuel injector cleaner or replace it if faulty.
  4. Reinstall the injector and fuel rail, ensuring all seals are intact.

5. Final Assembly and Testing

• Reconnect the negative battery terminal.
• Clear the P0302 code using the OBD-II scanner.
• Start the engine and check for proper operation, ensuring that the check engine light remains off.