Ancel BD310

doesn't sound familiar

 

Not sure specifically, but in general the firmware in these devices is not updated very often and is good for simple cars, but with hybrid systems that have lots of non-standard codes and subcodes specific to Prius you're better off using Dr. Prius app via an OBD2 and then if that's not sufficient getting into Toyota Techstream software via an old Windows computer.

I've seen more than one post that gets an error code that's not comparable to Toyota Prius and people replace that part only to find out that wasn't the problem. The Gas pedal sensor being the most common error that's not the problem

Here's buyer's guide for device to use Dr. Prius app: Hybrid battery diagnostic and repair tool for Toyota and Lexus

 

One caveat with Dr. Prius, as I understand it, is that it will pull only "engine codes" and "battery codes" from out of the > two dozen computers in the car. Engines and batteries aren't the only things in Prii that give codes; they might not even be the most common things in Prii to give codes.

It's not quite as bad as it sounds, because what it calls "battery codes" are really any codes from the power management control ECU, whether they're battery-related or not.

It's a great app for the nifty hybrid-specific data screens it can show you, but for simply pulling codes, you might also want a simpler app that just shouts out to the car "who's got codes?" and shows you whatever codes come back.

A very recent thread here reviews some of those options. mr_guy_mann first unplugged several things in a Prius to make sure there would be several trouble codes, and then reported which of the codes each app was able to report.

As expected, Dr. Prius showed only the ones from the ECM and the HV/battery ECUs (mr_guy_mann was testing on a Gen 2).

The best showing on that car (after Toyota Techstream, of course) looked to be OBDLink with an MX+ dongle.

In some ways, the networking in Gen 3 is simpler than Gen 2, which might mean that more of the tools are able to perform well for Gen 3.

 

That's right... That thread is so recent I installed the app on my phone and haven't had a chance to test it yet and slipped my mind in previous reply. It's pretty rare when an app comes along that outperforms the others. So I'll change my suggestion to before setting up Toyota Techstream, which can be challenging, try using both Dr. Prius app and Car Scanner app. More info at https://CarScanner.info