New member M59 1.6 16v gasoline

[marcrbarker]

Trouble with the factory scan tools is they pull out even more DTCs which often isn't a help. Each DTC is another potential wild goose chase, (or more paying work for the mechanic to replace something else unscrewable). Most cars over a certain age collect various DTCs anyway that doesn't stop them running, some DTCs throw the warning light every now and again, other DTCs never do. Then when there's later on a no-starting fault comes along then all these DTCs attract irrelavent work. And then there's extra DTCs on top of that get triggered each time unplug sensors, which is why mr. mechanic gets in habit 'clearing the codes', so he doesn't go off chasing more red herrings that weren't there before. 

Your passenger airbag fault sounds like one of the CANbus data wire. It's daisychained to various components in common with them. 

That's the trouble with "Diagnostics" now, no one seems to use logical thinking but instead they just find whatever is easily unscrewable that relates to on screen message, or in your case do the whole long list of them one by one. And because this replacement for the sake of it frenzy is so widespread is pushing down the sell cost of these parts, so china responds often with suspect build quality to meet the price. Original parts the car built with were often better than replacements. 

I was going to ask you where you got your diesel wiring diagrams from so I could go there same place myself. I guess it's going to be a bought thing, not something you can find online...