why does my Honda CR-V Fifth Generation (2017-2022) have a check engine light on

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool before starting work.

2. Addressing Error Codes

• Based on the error codes retrieved, identify the specific issue (e.g., oxygen sensor, catalytic converter, etc.).
• If the code indicates a faulty oxygen sensor:
  • Locate the sensor (pre-cat or post-cat).
  • Disconnect the electrical connector and remove the sensor using an O2 sensor socket.
  • Install the new sensor by reversing the removal steps, ensuring it is securely tightened to manufacturer specifications (typically around 30 lb-ft).

3. Inspecting and Replacing Spark Plugs

• Remove the engine cover if necessary.
• Use a socket wrench to remove each spark plug.
• Inspect plugs for wear and replace with OEM or equivalent plugs, ensuring a torque of 13 lb-ft.
• Reinstall engine cover and reconnect any disconnected components.

4. Fuel System Check

• Disconnect the fuel pump relay to relieve fuel pressure.
• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the "On" position (do not start) and read the pressure.
• If pressure is low, check the fuel filter and fuel pump for issues, replacing as necessary.

5. Vacuum Hose Inspection

• Visually inspect all vacuum hoses for cracks, abrasions, or disconnections.
• Replace any damaged hoses with OEM parts, ensuring a secure fit.