why does my Volvo XC60 Second Generation (2018-2024) check engine light flash when accelerating

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool before starting work.

2. Scan and Interpret Codes

• Use the OBD-II scanner to retrieve any diagnostic trouble codes (DTCs).
• Document the codes and refer to a repair manual for their meanings to direct further diagnostics.

3. Inspect Ignition Components

• Remove the engine cover if necessary to access ignition coils.
• Disconnect the ignition coil connectors.
• Remove ignition coils and inspect spark plugs for wear or fouling.
  • Replace spark plugs if worn or damaged.
  • Replace ignition coils if they show signs of failure.
• Reassemble components and reconnect connectors.

4. Check Fuel System

• Attach a fuel pressure gauge to the fuel rail.
• Start the engine and observe the fuel pressure; it should meet manufacturer specifications.
• If low, inspect the fuel pump, filter, and lines for blockages or leaks.
• Replace any faulty components as needed.

5. Inspect Air Intake

• Remove the air filter and inspect it for dirt or damage; replace if necessary.
• Check intake hoses for cracks or loose connections.
• Clean the throttle body if there is carbon build-up.

6. Inspect Exhaust System

• Visually inspect the exhaust system for any visible leaks or restrictions.
• Check for any blockage in the catalytic converter by looking for excessive heat or discoloration.
• Replace any damaged or faulty exhaust components.