P261C engine coolant pump b control circuit ow, what does this code mean

When there is conflicting information between the Prius repair manual and stuff on the internet, there isn't really conflicting information. The code is about the engine water pump circuits.

But keep in mind that the engine water pump circuits include more than just the pump itself. One of the most common diagnostic mistakes seen on PriusChat is when people get a code indicating a problem with some item X circuit, and immediately think "I should buy a new item X". The right move is to review what the trouble code is saying about the circuit, and electrically diagnose that, and fix whatever the problem turns out to be. The only times replacing item X will be the fix are when the circuit problem actually traces to the item itself.

 

Which is completely fair.

So I will do some more diag today. Maybe take it into an actual dealer to see what results they get and just fix it myself until I get get techstream running. But yeah, just have to trace things and see what's wrong.

 

Just do the trouble shooting steps in the PDF in post #18. You can save yourself the diagnostic fee at the dealership.