Volvo V60 rough running lambda sensor

Greetings. I recall facing comparable symptoms in my previous vehicle, a 2016 Opel Insignia diesel. The check engine light illuminated, accompanied by a noticeable decrease in engine performance and a distinct odor emanating from the exhaust system. Have you considered inspecting the NOx sensors, in addition to the components you mentioned, as they can significantly impact exhaust emissions and engine operation? Furthermore, it would be prudent to ascertain whether any abnormalities are present within the catalytic converter, as its malfunction can induce similar issues.

Thanks for the quick response! Very helpful. The NOx sensors – that's a good point. I hadn't thought of those. How did you eventually diagnose the exact problem with your Insignia, and what tests did you perform? What was the final cause?

Certainly. The diagnostic process for my Insignia involved a comprehensive evaluation utilizing specialized diagnostic instrumentation to monitor sensor readings and system parameters. After a meticulous analysis, it was determined that the root cause was attributed to a malfunctioning oxygen sensor situated downstream of the catalytic converter. Given the intricacies associated with modern automotive systems, it may be advantageous to seek assistance from a qualified workshop equipped with the requisite expertise and diagnostic tools to accurately identify and rectify the issue. It would be great to check for exhaust leaks too.

Thanks so much for sharing your experience! Very helpful. I took it to a local workshop, and after some tests, they confirmed it was indeed the lambda sensor. The exhaust leak came from a loose connection, which they also fixed. The total bill came to 375€. Runs like new now!