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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the spark plug wire or ignition coil from cylinder 1.
• Using a spark plug socket, carefully unscrew and remove the spark plug.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace the spark plug with the manufacturer-recommended type.
• Reinstall the spark plug and torque to the manufacturer’s specification (typically around 13-15 ft-lbs).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Remove the ignition coil from cylinder 1 by unscrewing the mounting bolts.
• Inspect the ignition coil for cracks or damage.
• If defective, replace it with a new ignition coil.
• Reinstall the ignition coil and secure it with the mounting bolts (torque to manufacturer specification).

4. Check Fuel Injector

• Tools Required: Fuel injector cleaner kit, multimeter (if testing resistance)
• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the resistance of the injector; it should match the specifications in the service manual.
• If the injector is faulty, remove and replace it with a new one.
• Reconnect the fuel injector connector.

5. Compression Test (if needed)

• Tools Required: Compression gauge
• Remove the spark plug from cylinder 1.
• Insert the compression gauge into the spark plug hole.
• Crank the engine for a few seconds and record the compression reading.
• Compare the reading to manufacturer specifications. If low, further investigation is required for internal engine issues.