Took my Infiniti to three different workshops and still no clear answer, what am I doing wrong?

I have been dealing with this situation for almost six weeks now and honestly I am at the point where I just need someone to point me in the right direction. My Infiniti started showing a warning light about two months ago and I took it to three different workshops hoping to get a clear answer about what is actually wrong. The first place said it was a sensor issue, the second one said it could be related to the exhaust system, and the third one was not even sure and wanted to keep the car for several days just to investigate. Every time I leave a workshop I feel more confused than when I went in and I have already spent money on checks that led nowhere. A friend who has been driving Infiniti cars for years told me I should have gone straight to Infiniti Repair Center Experts Musaffah from the beginning because general workshops often struggle with brand specific diagnostic systems and end up guessing rather than actually knowing. He said Infiniti vehicles need the correct software to read fault codes properly and most regular garages simply do not have it. I checked and it made a lot of sense when I read about how proper Infiniti diagnostics work differently from generic OBD readers that most workshops rely on. Apparently the difference in what information gets picked up is quite significant and that is probably why nobody has given me a consistent answer so far. I feel a bit frustrated that I did not look into this earlier but at least now I understand why I kept getting different opinions. Has anyone else gone through something similar where multiple workshops could not agree on what the problem was and how did you finally get it sorted?

Three different diagnoses for the same warning light usually means generic scanners pulling generic codes that don't actually identify the specific Infiniti system involved. Brand specific software reads way more detail from the same fault. That explains the inconsistency you experienced perfectly.

Went through something almost identical with mine, generic OBD reader gave a vague code that two shops interpreted completely differently. A proper Infiniti specific scan tool resolved it in one visit.

Six weeks and three workshops without a clear answer is genuinely frustrating, been there myself. The pattern you described, sensor versus exhaust versus needing days to investigate, sounds exactly like shops guessing without the right diagnostic equipment. Once I went to a place with proper brand specific software the actual cause was identified within an hour. Generic scanners just don't pull the same depth of fault data.

The keeping the car for several days to investigate line from the third shop is usually code for trial and error rather than actual diagnosis. Proper equipment identifies the issue same day in most cases. Worth going somewhere with the right tools from the start instead of paying for more guesswork.