Modern cars can be a nightmare without a reader.
Would always have one in my toolkit.
But a reader is not a substitute for thinking and generic can lead you astray as codes are generic and may not accurately define the problem.
OBD and OBD2 are the worldwide standards, OBD2 the latest.
EOBD(2) are the European equivalents and the protocol that Euro cars are produced to.
To all intents and purposes for the average DIY, the same.
The protocols only cover engine faults, ie what is in the
So forget airbags or bulbs and the like, not included.
Cheap readers will only cover the
and OBD protocols, more expensive will get you deeper into the car and into specifics for the make.
Pays your money, takes your choice. Professionals will almost certainly invest heavily into top range all singing and dancing.
DIY...cheap as chips do the same as more expensive OBD2 readers but are more likely to be clones that may not work, pays your money takes your pick.
Stick ELM327 into
, hundreds of the things.
The wifi and Bluetooth ones will happily connect to your mobile (smart) phone and turn that into a usable scanner.
With decent App, Torque on android, can get real time readouts that may help with what is happening as well as error codes.
Couple of quid from Hong Kong, fiver from UK... do a job.
Wifi enabled gets you into IOS and Android and less likely to be a cheap clone... if you can find a true V1.5 (don't trust the advert wording) can get into one app that is specifically for Renault and gets into other controls then the
Caveat Emptor but as good a starting point as any.
Whether they will get into your diseasal ??
While protocol only became mandatory for diesels after 2004, never an issue getting codes from my Scenic (54 plate) and though cannot get codes from my Kia (2002) can get some live readings.