2021年9月16日 · There is little doubt you need the brake actuator. C1391 Is one of the codes. Obviously a final diagnosis should be made, most likely the dealer will say change it. I would find an independent hybrid shop to install and test. Probably half to two thirds the price. Less if you can do it. I would change both parts.

C1391 is not one of the codes where that's likely to work for long, though. Not in Gen 3, it turns out: the booster and the master cylinder are the same assembly (whose full official name is some mouthful like SUB-ASSEMBLY, BRAKE BOOSTER WITH MASTER CYLINDER, and if that's not enough, that same assembly also contains the ABS actuator and the ECU).

2017年10月22日 · C1391 I believe was the same code that came up for me too. The solution for my 2010 Prius was a Master Cylinder replacement (however they also replaced the brake actuator but did not fix the issue). I had the guys over at …

2018年1月15日 · I have a 2010 Prius with a VIN not in the recall group that got the Brake/ABS C1391 code. After looking at this forum, it looked like it was a $4000+ repair bill. It has 166000+ miles.

2018年1月2日 · C1391 is a brake actuator or accumulator problem. I replaced both at the tune of $75 each and 6 hours of Labor.$50 and 6 hours of my life it did the job myself and the dealer wanted $4,000 #7 douglasjre , May 6, 2018

Customer: 2013 Toyota Prius , brake issues. car throws a code :C1391. replaced brake booster 2 times. starting to believe pump leaking air back into fluid. VIN "EU" Model Mechanic's Assistant: What is the color and consistency of the fluid?

Customer: Received code c1391 for an abnormal leak in accumulator. The brakes have been working fine, and nothing seems to be out of the ordinary when driving or stopping. The brakes have been working fine, and nothing seems to be out of the ordinary when driving or stopping.

2016年11月23日 · Just got the C1391 code for abnormal leak in accumulator on my 2013 Prius. I bought one of the Mini VCI cables and grabbed the code through techstream after getting brake, ABS and traction control lights on the dash. Is this a common issue on the 2013? Through my research it seems only common on the earlier models.

The C1391 code on your 2010 Prius indicates an abnormal leak in the brake accumulator pressure, often related to the brake booster and master cylinder assembly. The buzzing sound you hear is likely the brake actuator pump maintaining hydraulic pressure.

dtc c1391 . read below for most probable causes and click on link to view step by step troubleshoot for this dtc, we have 2 possibilities , leakage in the system or the actuator is bad. it will need a test hooked to your dlc connectpr to perform this test . 2007 lexus ls 460. v8-4.6l (1ur-fse) vehicle. vehicle probable causec1391/69. c1391/69 ...