how to fix a Toyota Camry with a P0302 misfire code

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Allow the engine to cool before starting repairs.

2. Replace Spark Plug

1. Remove the ignition coil for cylinder 2:
   • Unplug the electrical connector from the ignition coil.
   • Remove the mounting bolt(s) securing the ignition coil and carefully pull it out.
2. Remove the spark plug:
   • Use a spark plug socket and ratchet to remove the spark plug from cylinder 2.
3. Install the new spark plug:
   • Gap the new spark plug to the manufacturer's specifications.
   • Apply a small amount of anti-seize compound on the threads (optional).
   • Install the spark plug and torque it to the manufacturer's specifications (typically 13-20 lb-ft).
4. Reinstall the ignition coil:
   • Position the ignition coil back onto the spark plug and secure it with the mounting bolt(s).
   • Reconnect the electrical connector.

3. Test and Replace Ignition Coil (if necessary)

1. Use a multimeter to measure the resistance of the ignition coil:
   • Check the primary and secondary resistance according to manufacturer specifications.
2. If the coil is faulty, replace it with a new one:
   • Follow the same steps as above for removal and installation.

4. Inspect and Replace Fuel Injector (if necessary)

1. Remove the fuel rail to access the fuel injector:
   • Relieve fuel pressure, disconnect fuel lines, and remove the mounting bolts for the fuel rail.
2. Remove the faulty fuel injector:
   • Pull the injector straight out of the rail.
3. Install the new fuel injector:
   • Lubricate the O-rings with clean engine oil and insert the injector into the rail.
   • Reattach the fuel rail and reconnect all lines.