what can cause a P0302 code in my Toyota Camry?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 2:
  • Disconnect the electrical connector.
  • Remove the mounting bolts using a socket set.
• Remove the spark plug:
  • Use a spark plug socket to unscrew the spark plug from the cylinder head.
• Inspect the spark plug for wear and carbon buildup:
  • Replace with a new spark plug if necessary, ensuring it matches the manufacturer’s specifications.
• Reinstall the spark plug and ignition coil:
  • Torque the spark plug to the manufacturer’s specifications (typically around 13-15 ft-lbs).

3. Inspect and Replace Ignition Coil

• If the spark plug is in good condition but the misfire persists, test the ignition coil:
  • Use a multimeter to check the primary and secondary resistance.
• If the ignition coil is faulty, replace it with a new one:
  • Reinstall and torque it to the manufacturer’s specifications.

4. Check Fuel Injector

• Remove the fuel injector from cylinder 2:
  • Disconnect the electrical connector and fuel line (take precautions for fuel spillage).
  • Remove the mounting bolts or clips.
• Clean the fuel injector or replace it if faulty:
  • Use a fuel injector cleaning kit or replace with a new injector.
• Reinstall the fuel injector and reconnect all components.

5. Compression Test

• Perform a compression test on cylinder 2:
  • Remove the spark plug and connect the compression gauge.
  • Crank the engine for a few seconds and note the reading.
• If compression is low, further investigation into the engine’s mechanical condition is needed (e.g., valve seals, head gasket).