high emissions

[neanderthal]

volvo v50 2.0d 2007 just failed M.O.T on high emissions emitting black smoke took it for a blast still failed would some liqui moly diesel purge sort it cant afford garage at the moment.here are the codes that came up but no indication of egr etc should i look at cleaning it in case it maybe sticking or maybe my injectors are faulty but dont know how to check them(if at all)with my snap on.....DF11...can-h high speed network missing....8C20...rear fog lamp faulty signal....6F11+6F12....sunroof faulty signal....4F48....seat belt buckle rear left hand signal too low....6F83....dimmer faulty signal.....4F82....lamp,seatbelt reminder faulty signal.....DD1A....communication with rrx control module signal missing....8D06.....right hand stop lamp faulty signal.....E010.....control module internal fault.....8003.....mirror heater shorted to supply....0005....power supply from battery too low.....0003 pad/pae lamp faulty function.....ran car up to temperature then took 3 pictures of values...ime very basic with how to use a snap on solus ultra 19.4 software...cant upload values as security token missing

[neanderthal]

here are the pictures for the above question

[Familyman 90]

If a diesel is clagged up enough to fail the emissions test then "taking it for a blast" is 20 or 30 miles of motoring at moderately high engine speeds, and then straight into the MOT bay while the engine is still piping hot hot hot!

If you've not done that type of mileage at at least 3000 rpm then the Italian tune up is unlikely ease things, assuming of course that is the problem.

[neanderthal]

would liqui moly help and shall i buy injector cleaner if yes do i put it in the tank when its low and take it for a run or fill the tank once ive put it in.or any kit form i can use....i cleaned the egr pipe out.i couldnt get the egr valve off to check if it is sticking but the car seems to run ok...also look at the crap i cleaned out of the big plastic thing(pic1) that air pipe goes to... i didnt know how to take it apart so cleaned it out best i could...stupid me forgot to take a picture of the throttle body before i cleaned it out. as it too was bunged up

[Wgl2020]

To be honest that level of diesel crud doesn't look too bad.

I would make sure that your MAF and MAP sensors are clean as these can effect emissions ( use a dedicated contact cleaner/ sensor cleaner).

Whilst I am generally a fan of fuel additives I wouldn't expect too much if there is an underlying issue. Liqui Moly have a decent reputation though and for the cost its no great loss if it doesn't work. Maybe have a search for a local garage that offers terraclean which is a similar kind of thing but potentially a lot more effective (does cost more though).

[neanderthal]

put a bottle of wynns cleaner in the tank cleaned all sensors i could apart from the egr valve itself(hard to get off)..went for a 22 mile drive at 300rpm and the m.o.t. centre says the emissions are now slightly higher still emitting a lot of black smoke any ideas