robertneumann6
Aygo Warning Light and Smoke
Summary of the thread
A 2019 Toyota Aygo owner reported a warning light on the speedometer and smoke during acceleration, suspecting an emissions-related issue. The problem was identified as a faulty exhaust back pressure sensor, which can cause sluggish performance and smoke. It was advised to have the sensor checked by a professional due to the need for diagnostic tools. After repair, the car's performance returned to normal.
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4 comment(s)
robertneumann6 (community.author)
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?
jasminstern1
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.
robertneumann6 (community.author)
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!
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TOYOTA
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AYGO
jasminstern1
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.