I've enough work but under staffed to start with,
Mended the van yesterday.... engine light has been on months, after a week of looking I found my cheapo elm327 scanner lead & then looked the fault codes on the internet
P0093 - Fuel System Leak Detected - Large Leak
P1351 - IDM input circuit Malfunction/Ignition coil control circuit High voltage (Siemens system - Pre/Post heating relay circuit. Relay not controlled and glow plugs supplied).
Whipped the plastic engine cover off & had a look how hard replacing glow plugs or the relay would be, had wipe around the top end as there a small amount of oil present, guess the oil might be diesel from the bolt which secure an injector, checked 'em with a torx bit on a ratchet & no.1 is very loose & no. 3 is quite loose.
Fire the old beast up, no faults present, press the reset button & volá engines light is off & remained for 100+ml of chasing around happyland today,
I'd bet the tame mong in my local garage would have charged lots & taken a long time to mend it, call me Dr Diesel