Aygo Warning Light and Smoke

Sounds like it could be an exhaust issue. The warning light and smoke are classic signs. Has the car's performance changed at all? Is it sluggish, or idling rough? It's possible the exhaust back pressure sensor is faulty, impacting your vehicle emissions.

Thanks for the quick reply! Yes, now that you mention it, the car does feel a little sluggish and less responsive than usual. Is the exhaust back pressure sensor something that's easy to check myself, or would I need special equipment?

Given the symptoms and mileage, a faulty exhaust back pressure sensor is probable. While you could try visually inspecting the sensor and its wiring for damage, accurately diagnosing it usually requires diagnostic tools to read sensor data and error codes. Without the right equipment, it's difficult to confirm. Considering the sluggishness and smoke, it's best to get it checked by a workshop to avoid further damage to your emission control system.

Thanks, I appreciate the advice. I took it to a local mechanic, and you were right, it was indeed the exhaust back pressure sensor. The total repair cost was 245€. Now the car runs perfectly!