I had a problem with this air fuel ratio gauge and I contacted APSX from two different sources that lead to an email or different emails. I made a video (private) and send it to them so I know they watched it but no answer.
I would not recommend to buy this brand only because of the support. It is a non existent support but the gauge looks cool.
This is what I used:
Buy an AEM or Gloshift would be my suggestion. APSX brand has no support and I also read that online a lot.
All of that said. If you have it already and is having the problem that it never goes to 19.0 so you can't finish or start configuring then this video will also help you. I manage to find what the issue was and made mine work. (without their support)
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