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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal from the battery to prevent electrical shock and ensure safety.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, gap gauge.
• Remove the ignition coil from cylinder 1 by unfastening the retaining bolt and disconnecting the electrical connector.
• Extract the old spark plug using the spark plug socket.
• Check the gap on the new spark plug using a gap gauge and adjust as necessary to the manufacturer's specifications (typically around 0.043 inches).
• Install the new spark plug, tightening it to the specified torque (usually 13-15 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• If the ignition coil is faulty, remove any bolts securing it.
• Disconnect the electrical connector from the ignition coil.
• Install the new ignition coil in the reverse order of removal and torque the bolts to specifications.

4. Inspect and Clean Fuel Injector

• If the fuel injector is suspected to be clogged, remove it from cylinder 1.
• Clean the injector using a proper cleaning solvent or replace it if necessary.
• Reinstall the cleaned or new injector, ensuring it is seated properly.

5. Compression Test (if necessary)

• If previous steps do not resolve the misfire, conduct a compression test.
• Remove the spark plugs from all cylinders.
• Insert the compression tester into cylinder 1 and crank the engine to get a reading.
• Compare the reading to factory specifications; if low, further engine diagnostics may be required.