2012 Prius V intermittent brake issue.

Phillipe quintela · Jun 15, 2022

Lance DiBitetto said: ↑

Hey, I know that this thread is a little old now but, I was able to completely verify that it was the ELM327 Bluetooth OBDII dongle causing the issue. First off there are none of the symptoms that come with a bad brake accumulator (the weird cycling sound every 10 or so seconds or so hard braking etc...) I removed the OBDII dongle and the issue never came back...for months. just today, though. I was checking codes with the Dongle and had to run to the store and forgot to take it out, I had no issues going to the store but, when I was on my way back, the lights on the dash indicating a brake problem popped on and the regen braking stopped working, I pulled over turned off the car and pulled the dongle. started the car back up and everything was gone, as if it never happened. haven't had the problem again, and it never threw any codes. Matter of fact I upgraded to a different OBDII dongle that uses Toyota Techstream software and there are no codes with that as well.
I thank everyone for their input, without it, I may have made a terrible, very expensive mistake. View attachment 192425
Click to expand...

i know its been a while! However , sadly my prius has been behaving in very similar fashion. I wanted to get an easier way out of spending 2k-3k with the actuator. Could you explain to me what was done here?

bisco · Jun 15, 2022

he removed the dongle

2012 Prius V intermittent brake issue.

Phillipe quintela New Member

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2012 Prius V intermittent brake issue.

Phillipe quintela New Member

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