how to fix the P0301 code in my Toyota RAV4 XA50 (2019-2024)

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical hazards.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the ignition coil from cylinder 1:
  • Disconnect the electrical connector.
  • Unbolt the ignition coil using the socket and ratchet.
• Remove the spark plug from cylinder 1:
  • Use the spark plug socket to unscrew.
• Inspect the spark plug for wear, carbon buildup, or damage.
• If necessary, replace with a new spark plug, torquing it to manufacturer specifications (typically around 13 lb-ft).

3. Test and Replace Ignition Coil

• Reinstall the ignition coil if it appears fine; otherwise:
  • Replace the ignition coil for cylinder 1 with a new one.
  • Reconnect the electrical connector and bolt it down securely.

4. Inspect and Clean Fuel Injector

• Remove the fuel injector from cylinder 1:
  • Disconnect the electrical connector.
  • Unclip the fuel line (be cautious of fuel spills).
  • Remove the retaining clips and pull out the fuel injector.
• Clean the fuel injector using a specialized injector cleaner or replace it if necessary.
• Reinstall the injector with new O-rings to prevent leaks.

5. Perform Compression Test

• Reconnect the battery.
• Conduct a compression test on cylinder 1:
  • Remove the spark plug and install the compression gauge.
  • Crank the engine and read the compression value; it should be within the manufacturer's specified range.
• If compression is low, further inspection of the engine internals may be needed.