how to fix P0301 code in Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Locate the spark plug for cylinder 1 (usually closest to the front of the engine).
  3. Disconnect the ignition coil connector.
  4. Remove the ignition coil using a socket set.
  5. Remove the spark plug using a spark plug socket and ratchet.
  6. Inspect the spark plug for wear. Replace if necessary with OEM specifications (usually around 0.043 inches gap).
  7. Install the new spark plug and torque to manufacturer specifications (typically 13-15 lb-ft).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the ignition coil was found faulty, install a new ignition coil.
  2. Ensure the coil fits securely and connect the ignition coil connector.
  3. Reinstall any components removed during spark plug replacement.

4. Check and Clean Fuel Injector

• Sub-steps:
  1. If the fuel injector is suspected to be faulty, remove the fuel rail.
  2. Disconnect the fuel injector electrical connector.
  3. Remove the fuel injector using the appropriate tools.
  4. Clean the injector with a suitable cleaner or replace if necessary.
  5. Reinstall the fuel injector and reconnect the fuel rail securely.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug for cylinder 1.
  2. Insert a compression gauge into the spark plug hole.
  3. Crank the engine for a few seconds and record the compression reading.
  4. Compare the reading to manufacturer specifications (usually around 180 psi).
  5. If the compression is low, further investigation into internal engine components may be necessary.