VelSatis Throttle Valve Defect

I recall a similar issue with my previous vehicle, a 2012 Opel Insignia. Reduced power and the check engine light suggest a potential issue with the air flow management. In my case, the problem was a faulty throttle sensor. When this sensor fails, the engine may enter limp mode. Have you checked the throttle sensor readings, or inspected the throttle body for obstructions or damage? What diagnostic codes are you receiving?

I haven't looked at the diagnostic codes yet, but your mention of the throttle sensor makes me wonder. Could you explain how to check the throttle sensor readings? Also, what was the approximate replacement cost on your Opel Insignia? This would help me prepare for the financial implications.

To check the throttle sensor readings, you need a diagnostic scan tool to monitor the sensor's output voltage. Erratic readings usually mean a faulty sensor. For the Insignia, the replacement of the throttle sensor, including labor, was about 220€ at an independent shop. Given the symptoms, I'd advise getting a professional diagnosis at a reputable workshop. They can assess the throttle valve system, including the sensor, throttle body, and electronics.

Based on your experience, I scheduled an appointment with a trusted mechanic for an inspection. It turned out that the throttle valve was defective. The final replacement cost including labour and parts was 265€. Thanks again for your time.