2005 Prius ABS, VSC, BRAKE lights on despite new 12v

Hello PriusChat,

Longtime reader, first time poster.

I am the second owner of an '05 Prius with 157k miles. Owned it for the last 3 1/2 years driving in temperate weather in the mountains of North Carolina without any mechanical issues. Fantastic car.

Last week the dreaded ABS/VSC/Brake lights and nausea-inducing warning buzzer popped up while driving in reverse in a parking lot. This is the second time I've seen them...about 6 months ago they came one and I managed to get them to go away after a few rounds of turning the ignition on and off.

This time no such luck, so the car went to the dealership. This is what they found:

C1300 ABS ECU
C1256 Accumulator Pressure Low

They recommended replacing the Skid Control ECU for $1886.00, warning that there was a chance the ABS Actuator would need replacing too for an additional $2440.00.

Based on what I found on PriusChat, I asked them to do the following:

Check ABS Pump and connections
Replace the original 12v Battery
Clear DTC codes


I now have a new battery, but the dealership reports those 2 codes are still appearing.

Does anyone have other suggestions before I bite the bullet and replace these parts, or possibly look at a trade-in?

 

Patrick, thank you so much for your reply. I have a ton of respect for your opinions and all the help you've offered on this forum.

A few last details about my case, on the off-chance they are relevant:

Earlier the same day that these lights popped up the car was in the dealership's "Express Service" shop and received the following:

Oil Change + engine additive
Tire Rotation
Washer fluid top-up
Replaced one skid plate clip [not exactly sure if that's the right term...it cost $18]


The dealership assures me their Express Service couldn't have led to these error codes, and this problem is a coincidence. I have no reason not to trust them, but it is awfully coincidental. Just thought it might be worth mentioning.


Thanks again for the help.