Power loss does not always trigger a clear warning

The BMW owner returned to the workshop after the car began losing power. The fault list did not show a clear MAF sensor error, so the diagnosis focused on live data rather than fault codes alone.

Data logs were used to compare the airflow requested by the control unit with the measured value, alongside engine speed and injected fuel quantity. The readings indicated that the MAF sensor was operating inaccurately. Software changes were then made, including changes to MAF, EGR and DPF control. The video also mentions an adjustment to throttle control.

A road test followed the work, and the car’s response and performance felt noticeably better. Fuel consumption had not yet been assessed: AutoChip planned to contact the owner after one or two weeks. The video therefore does not confirm a reduction in fuel use.