2007 Prius - Brake, Brake warning (!) ABS and VSC lights ON

On my way home this evening noticed that Brake, Brake warning (!) ABS and VSC lights are ON(first image)

I came home, had dinner and then went back to start the Prius and I get Brake, Slip Indicator?, Brake warning (!) ABS, VSC and check engine lights are ON(second image)

I shut down and re-started and am back to Brake, Brake warning (!) ABS and VSC lights.

Before starting the engine, the diagnositc check showed battery at 11.9V and after starting the engine, it showed 14.3V

Still researching this forum but figured i'd post in the meantime.

Prius is a 2007 Touring model.
Recently(Sep 2015) replaced the 12v battery with Optima Batteries 8171-767 (DS46B24R) YellowTop.
The front 2 tires have worn out to the point that am considering replacing them although they still have some life but I can feel that the car is slightly pulling to the right when I drive.

About 3 weeks ago, I poured about 10 oz of "Chevron 65740 Techron Concentrate Plus Fuel System Cleaner" before pumping gas, haven't noticed any difference in mileage except possible it may have gone down by 2mpg to 3 mpg.

Other than that, there is no issues.

Where do I start to troubleshoot ? and is the car still drivable ?

 

152K and still on original hybrid battery.

I don't have the tool to read the codes - apparently, i need to invest in that.

I feel confident it's not the 12v battery since I can compare to the previous reading(had 10.9V as opposed to 11.9 on this one)

Is there a way to reset the code or is it time to take it to a dealer?

 

Disconnected for 5 minutes and same thing - initially, all 6 lights come up and shut down and re-start only 4 lights come up

 

Will check it out.

Was able to drive to work safely. Stopped at Gas station to pump this morning at 7am since it showed only 1 dot in the fuel indicator and I was only able to pump about 5.9 gallons while usually am able to pump about 8 gallons on 1 dot - Thought that was wierd.

 

Looks like you've a bad battery - did you replace it yet?

I checked the battery again this afternoon. On NO load, it fluctuates from 11.9V to 12.3V

I then, turned ON the headlights, interior lights and A/C and it dropped to 11.7V and never below that. I couldn't turn ON the radio but lights and A/C would have added additional load.
When I hit the brake pedal, engine would kick-in and it would show 14.4V. So am leaning towards maybe the battery is fine(since it was purchased new about 6 months ago) but perhaps some other sensor is gone wrong?

 

Did you replace with an Optima or Toyota battery?

 

We have another Prius at home and it has the same voltage rating and doesn't have those lights come up. The battery age is about 9 yrs old.

Ignition: 11.8V and when you engage engine it goes upto 14.3V

Anyway, am thinking of taking it to the Dealer soon for a diagonostic check.

 

Thanks will check them out.

I took the Prius to the dealer and after paying a $95 diagnostic fee, am told that the following things needed to be done.

1. Replace ABS Actuator Assembly, R&R and
2. Bleed the ABS Actuator Assembly, R&R.

Total price was about $2500

They gave me two diagnostic code as well
C1256 - Accumulator Low Pressure
C1391 - Abnormal Leak of ACC Press.

Does anyone know what the part numbers are and if $2500 is a reasonable estimate or if I should pursue alternative options?

 

48mpg,

Thanks for responding.

I don't hear any alarm buzzing noise although, I just have to depress the brake a bit more than normal and don't see any difference in driving.

I intend to keep the car for at-least another 5 yrs or so and would like to get this fixed but am just taken back at the high cost.

How long is the warranty from Tampa Hybrid for the brake actuator - since it's used, probably 90 days? Did Tampa Hybrid run any diagnostics?

How did you diagnose it was the ABS sensor wire? was it the alarm buzz?

 

Here is the diagnostic report. Sorry the cell phone camera resolution is low.

Does anyone know the part number for a 2007 prius for ABS Actuator Assembly ? Thanks.