my Volvo XC60 Second Generation (2018-2024) has a check engine light and runs rough what's wrong

Solution

1. Preparation

• Gather all necessary tools and parts.
• Park the vehicle on a flat surface and engage the parking brake.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Spark Plugs

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Sub-steps:
  1. Remove the engine cover (if applicable) by unscrewing retaining bolts.
  2. Disconnect the ignition coils by pulling off the connectors.
  3. Remove the ignition coils using a socket set.
  4. Carefully unscrew the old spark plugs using a spark plug socket.
  5. Inspect the old plugs for wear; compare to new plugs.
  6. Apply dielectric grease to the threads of the new spark plugs.
  7. Install the new spark plugs and torque to manufacturer specifications (typically 15-20 lb-ft).
  8. Reinstall the ignition coils and reconnect the connectors.

3. Clean or Replace Fuel Injectors

• Tools Required: Fuel injector cleaner, wrench set.
• Sub-steps:
  1. Relieve fuel system pressure by removing the fuel pump fuse and running the engine until it stalls.
  2. Disconnect the fuel lines from the injectors carefully.
  3. Remove the fuel rail if necessary to access the injectors.
  4. Clean the injectors using a fuel injector cleaning kit or replace them if necessary.
  5. Reinstall the fuel rail and reconnect the fuel lines securely.

4. Inspect Vacuum Hoses

• Tools Required: Visual inspection tools.
• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or loose connections.
  2. Replace any damaged hoses with OEM or high-quality aftermarket parts.
  3. Ensure all connections are tight and secure.