Seat Leon Hybrid Reduced Engine Power

I have experienced a similar issue with my Leon, though the build year is different. The symptoms you describe suggest a potential throttle body malfunction. Before condemning the unit, have you inspected the air intake system for obstructions or leaks? A compromised air intake can manifest symptoms like a faulty throttle body. Can you share any diagnostic trouble codes retrieved from the check engine light? The code will give insight into the failure.

Thank you for the insight. I have not checked the air intake myself. I did scan for codes and it pointed towards the accelerator pedal module. Are you suggesting the air intake could falsely trigger that?

Indeed, a compromised air intake or a dirty throttle body can induce erratic readings from the accelerator pedal module due to the disruption in airflow. While the diagnostic code points to the module, it is crucial to rule out other potential causes. Given the hybrid nature of your vehicle and the mileage, it would be prudent to have the entire system inspected by a qualified technician. A defective throttle valve is plausible, and replacement is often the most expedient solution. Continuing to operate the vehicle in its current condition could potentially exacerbate the problem, leading to further component failures. The cost you stated for the repair seems to be fair.

I appreciate the confirmation and advice. It turned out to be a defective throttle valve as suspected. The repairs including parts and labor came to 265€. Fuel efficiency seems to be back to normal now.