FI light blinks - 0 ; Engine operates normally

Hi everyone,

I have encountered a few electrical issues with my motor since I've had it (bad grounding, bad contacts injector plugs). As a result my motor unfortunately has been for 2 years of the for years that I own this one in the workshop. The engine currently just runs fine and smoothly, but my mechanic seems to be unable to tackle this one.

The current issue is the following:
FI light blinks - 0 (=continuous)
Engine operates normally

1. Blown malfunction indicator bulb
2. Open or short circuit in malfunction indicator wire
3. Faulty ECM

The ECM has already been checked, could anyone give me some help with 1 and 2?

Second: I had a currently non connected brand new Dynojet tuning kit mounted, it should not be a problem to have it tuned anyway, no?

Thanks for your help!