diagnostic equipment wont read car

[nat hart28]

hi I invested in a op-com diagnostic kit and it wont read the car, I have two corsa 1 litre and it read one but not the other , reads all other vauxhall iv tried it on but not mine,does any1 know why thanks

[martinchalk]

I had the same issue with my Corsa... two different garages had machines which could not read the diagnostics. Took it to a garage that had a proper Vauxhall tool, and it managed to read it.

[nat hart28]

the equipment I have is the proper one, I have two identical cars the only difference is one is 5 door and the other 3 and it would read one but not the other