how to fix P0301 cylinder 1 misfire code in Toyota Camry XV50 (2012-2017)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 1 by detaching the electrical connector and unscrewing the mounting bolts.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear or fouling; replace it if necessary.
• Install the new spark plug and torque to the manufacturer specification (typically around 13 ft-lbs).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Check and Replace Ignition Coil

• If the spark plug is in good condition, check the ignition coil for faults using a multimeter.
• Tools Required: Multimeter.
• Measure the resistance of the primary and secondary windings of the ignition coil.
• If out of specification, remove the ignition coil and replace it with a new one.
• Reinstall the ignition coil after replacement.

4. Inspect Fuel Injector

• Tools Required: Fuel injector cleaner, basic hand tools.
• Remove the fuel rail and inspect the injector for clogs or leaks.
• Clean the injector with fuel injector cleaner or replace it if necessary.
• Reinstall the fuel rail and ensure proper connections.

5. Perform Compression Test

• Tools Required: Compression gauge.
• Remove the spark plug from cylinder 1.
• Insert the compression gauge into the spark plug hole and crank the engine.
• Compare the reading to the manufacturer’s specifications; if it’s low, further investigation is needed.