Long shot... but here goes. So I have this error code on my vw mk7 gtd 2015 135k mileage.
It does its regens no problem. Technician told me he doesnt understand as there is no NOX sensors so what's the problem. Ive had the top lambda sensor changed and having done some research, it says check the values of temps, oxygen etc. But technician is saying he doesnt see that that would necessarily tell it exactly what's wrong because an error code saying the sensor is damaged would've come up.
He said he's had one in before and hasn't been able to figure it out.
Anyone had similar issue.
