how to fix the P0301 misfire code in my Toyota Camry XV70 (2018-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the engine is cool and disconnect the negative battery cable for safety.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1.
• Unscrew and remove the spark plug.
• Inspect the spark plug for wear; replace if necessary.
• Install the new spark plug, tightening to manufacturer's specification (typically around 13-15 lb-ft).
• Reattach the ignition coil.

3. Test and Replace Ignition Coil (if necessary)

• Tools Required: Multimeter.
• If the ignition coil was tested and found faulty, remove the ignition coil from cylinder 1.
• Install a new ignition coil, ensuring it is securely seated and connected.
• Reconnect the battery.

4. Test and Clean/Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector cleaner or replacement injector, fuel line disconnect tool.
• Disconnect the fuel line from the injector and remove the injector from the fuel rail.
• Clean the injector with a fuel injector cleaner or replace it with a new one.
• Reinstall the injector and reconnect the fuel line.

5. Compression Test (if misfire persists)

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester and crank the engine to measure compression.
• Compare the reading to the manufacturer's specifications; if low, further investigation will be needed for internal engine issues.