diagnostic gear what do I need ?

[turbod]

As title suggests are the cheap cables and discs on ebay all I need to access the diagnostics and adjustment of other items or are they very limited in functions? I need to diagnose a bad tickover on idle on my pd 130 and I have read that this could be a bad injector wiring loom, plus I would like to be able to turn the auto door locking off and be able to re set service lights etc

Sorry for being Luddite

 

[Driver]

An OBD11 reader (can get them cheap at eBay/Amazon) and an app (e.g. Carista).

 

[turbod]

Ok that's brilliant thanks

 

[stu_m]

VCDS would be better

the bad tickover could more than likely be the loom

 

[turbod]

Yeah or it could possibly be the head gasket which is very overdue, but to be fair I haven't got a garage to do the work or the use of my bike again as it is far too cold still up here. Hopefully I haven't completely ruined the head. After putting two new tyres on last week the flywheel also started rattling.... I have been trying to find a good engine and flywheel in the last couple of days. I know I know I'm a tw## for not getting it done but to be fair the car has run ok apart from using maybe 1.5 litres in 5 months