The DPF had already been removed from this 2010 Fiat Punto 1.3 Multijet, and another workshop had previously changed the related control software. Before the software was revised, the exhaust test produced considerably higher analyser readings, described in the video as roughly 5 to 5.5.

AutoChip reprogrammed the control unit and repeated the measurements. Several runs recorded readings around 1.0, 1.9, 1.6 and 1.8. No measurement unit is given in the video, so the values are stated without one.

This case shows how a software check and repeat exhaust measurements can help assess a particular vehicle after earlier modifications.