Brake problem {along with other indications} urgent help required

Hellow guys.
bought prius 2008 some 5 months ago Soon check engine light and master warning(red triangle) becomes On. (code P016)
The lights are still on despite engine flush and hybrid battery defected cells replaced.
some days earlier brake light started to appear on and off along with momentary flashing of zigzag road indication.Thishappens usually when hybrid battery shows full charge and vehicle is running on battery, same time, engine starts or not, braking action happen itself and car driving is not remain smooth but like some one is pushing throttle and removing again and again or like brakes are applying and releasing.

Yesterday i parked car in a way it was tilted, just like roll, for about 15minutes when started brake was very hard not pressing and not working along with ABS indication and constsnt beep sound. i then parked car in tilted posotion opposite to ealier position. after 2minutes i started the car abs indication and beep goes off, brakes were working though yellow brake light was on. I then drive 7km and came to home.
Plz guide me what to do. tomorrow i will go to a mechanic but here in Pakistan every mechanic say i know all but in actual they know very little (as far as hybrid vehicles are concerned). The way of diagnosis is fine, scanner, but the solution is....
solution is change the sensor first, which is sensing some abnormality.if problem not fixed change the parts by hit and trial.
So i am worried, I want to guide my mechanic, instead he do hit and trial job.

I will warmly welcome your valueable suggestions and comments, please reply as soon as possible.

I will share scanned codes as i will see.
Regards

 

hellow guys! sorry, i was feeling difficulties in log in, similarly i cannot upload image file of scanned codes so I am typing here the code names:

1. C1252
2. C1256
3. C1341
4. C1391

The health report by Toyota V49 06 showed following:

• Engine and ECT (Fault /3)
• HV battery (Fault /1)
• Hybrid control (Fault /2)
• ABS/VSC/TRC(Fault /4)
• Air conditioner (Fault /1), and
• Gateway bean (Fault /1).

Now please reply, specially those who were waiting anxiously.

 

Thankyou v.much
Mr. ChapmanF
I am to replace the ABS assembly.
hope the problem to be fixed.
Regards

 

well. it looks replacing ABS assembly might fix the problem. I also changed engine CAM with its governor for P0016 fault. it looks better too so far.
What is new thing is meter and all indication lights are completely off.

 

Some times all indications and lights ON just as normal but some times all goes OFF

 

normal, not new but not too bad

 

Thanks, it is helpful.
but i could not pinpoint what capacitors to replace, or should i do all.
regards

 

Thanks SFO
really helpful.
plz guide me
1.what can happen if traction battery goes almost dead.
2. whether brakes automatically applies if zigzag indication comes On or zihzag sensor has some kind of fault.
regards