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

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Replace Spark Plug

• Remove the ignition coil by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for signs of wear or damage.
• Install a new spark plug, ensuring it is gapped correctly according to the manufacturer's specifications (typically 0.043 inches).
• Reattach the ignition coil, securing it with bolts and reconnecting the electrical connector.

3. Test and Replace Ignition Coil (if necessary)

• Use a multimeter to test the ignition coil’s primary and secondary resistance according to service specifications.
• If it is out of range, remove the faulty ignition coil and replace it with a new one.
• Reattach the ignition coil.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector connector and the retaining clip.
• Carefully pull out the fuel injector from the rail.
• Clean the injector with a suitable injector cleaner or replace it if clogged.
• Reinstall the injector, ensuring it is seated correctly and reattach the retaining clip.

5. Conduct Compression Test

• Remove the spark plug for cylinder 1.
• Insert the compression gauge into the spark plug hole.
• Crank the engine a few times and record the reading.
• Compare the reading to the manufacturer's specifications; if low, investigate for potential internal engine issues.