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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if necessary to access the spark plug.
• Use a spark plug socket to remove the old spark plug from cylinder 1.
• Inspect the spark plug for signs of wear, carbon buildup, or damage.
• Install a new spark plug, ensuring it is gapped correctly according to the manufacturer’s specifications (typically around 0.043 inches).
• Torque the spark plug to the manufacturer’s recommended specification (usually around 13 lb-ft).

3. Replace Ignition Coil

• Tools Required: Socket set, ratchet.
• Disconnect the electrical connector from the ignition coil on cylinder 1.
• Remove the mounting bolts securing the ignition coil and pull it out gently.
• Install the new ignition coil, securing it with bolts and reconnecting the electrical connector.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, multimeter (if testing electrical).
• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the resistance of the injector (should be within manufacturer specifications).
• If necessary, remove the fuel injector and replace it with a new one.
• Reconnect the injector connector.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole and crank the engine several times.
• Record the compression reading and compare it to manufacturer specifications.
• If the reading is low, further investigation may be needed for potential internal engine issues.