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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, ratchet.
• Remove the ignition coil from cylinder 1 by unscrewing the bolts and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for wear or deposits; replace if necessary.
• Install the new spark plug and torque it to the manufacturer’s specifications (typically around 13 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil (if necessary)

• If the ignition coil appears damaged, replace it.
• Tools Required: Socket set, torque wrench.
• Remove the faulty ignition coil by unscrewing it from the engine block.
• Install the new ignition coil and torque to the manufacturer's specifications (usually around 7 lb-ft).

4. Test Fuel Injector

• Tools Required: Multimeter or noid light.
• Disconnect the fuel injector connector and check for voltage using a multimeter while cranking the engine.
• If there is no voltage, trace the wiring back to the PCM for issues.
• If voltage is present but the injector is not functioning, replace the fuel injector.

5. Check for Vacuum Leaks

• Inspect all vacuum lines connected to the intake manifold for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to detect leaks.
• Replace any damaged hoses and recheck the engine operation.