[maswastage]

My service engine soon light came on the other day. As far as I could tell it was running perfectly, no loss of power or roughness, but I took it in to be safe. They performed a check and the car returned fault codes 4677, 4687, 4697 and B1365.

As far as I can tell, the first 3 codes all mean the same thing: a problem with the "throttle valve actuator." I'm not sure what the last code means.

They performed a software update and the check engine light is gone, but I'm still not sure what was actually wrong. Diesels don't have throttles, correct? And certainly not throttle valves, right? My service adviser mentioned it was linked to the emissions system, so my wild guess is that it had something to do with the DPF regeneration. Do you guys have any ideas?