how to fix P0301 misfire code on Toyota Camry Eighth Generation (2018-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shocks.
• Ensure the engine is cool before starting work.

2. Replace Spark Plug

1. Remove Engine Cover (if applicable)
   • Use a socket set to remove screws or bolts securing the cover.
2. Disconnect Ignition Coil
   • Unplug the electrical connector from the ignition coil on cylinder 1.
3. Remove Spark Plug
   • Use a spark plug socket and ratchet to unscrew and remove the spark plug from cylinder 1.
4. Install New Spark Plug
   • Apply anti-seize compound on the threads of the new spark plug.
   • Torque to the manufacturer’s specifications (typically around 13 lb-ft).
5. Reconnect Ignition Coil
   • Plug the electrical connector back onto the ignition coil.

3. Replace Ignition Coil (if necessary)

1. Remove Ignition Coil
   • Unscrew the bolts holding the ignition coil in place and carefully lift it out.
2. Install New Ignition Coil
   • Place the new ignition coil into the cylinder and secure it with bolts.
3. Reconnect Electrical Connector
   • Ensure the connector clicks into place.

4. Test Fuel Injector (if necessary)

1. Remove Fuel Injector Connector
   • Carefully disconnect the fuel injector wiring harness.
2. Check Resistance
   • Use a multimeter to measure the resistance of the injector; compare with specifications.
3. Install New Fuel Injector (if needed)
   • Remove the old fuel injector and replace it with a new one, ensuring proper seating and connection.

5. Reassemble and Final Checks

1. Reinstall Engine Cover
   • Secure the engine cover back in place.
2. Reconnect Battery
   • Reattach the negative battery terminal.
3. Clear Codes with OBD-II Scanner
   • Clear any existing codes and reset the check engine light.