(Cross posting from XJS forum because it's the same engine.)

Recently I used an OBD2 code reader made by FIXD on my '96 XJS 4.0 litre. It worked fine to read and clear my CEL code, but it doesn't work to read "live gauges" which I think it is supposed to do. I wondered if anyone else had successfully used this brand of code reader on this kind of car?

Thanks,

-mB