2010 Toyota Prius: multiple warning lights

Filed May 5, 2025 · Brakes · FL

Code diagnostic C1391 ABS system. I have replaced this in my previous 2009 Toyota Prius, it has been replaced in this 2010 Toyota Prius, and now needs to be replaced AGAIN in the 2010 Toyota Prius. It’s incredibly dangerous, no warning signs, spongy brakes all of the sudden that barely feel like they’re going to work. It puts not only myself in danger, but others especially when it just happens without warning and all of the lights come on as you are driving and the brakes become extremely wonky.

Filed Dec 17, 2024 · Brakes · UT

My brakes stopped braking but luckily I could drive slowly into a curb in my neighborhood. God knows what could’ve happened if I was on the freeway. All the dash lights came on at the same time so I ran some codes; it came back C1391 - the brake actuator is broken. Toyota will not cover it despite this being a very common issue. My car is undriveable until this gets fixed because it will not break.

Filed Jun 21, 2024 · Brakes · 153,000 miles · MO

The contact owns a 2010 Toyota Prius. The contact stated while driving at various speeds, the brake pedal would depress to the floorboard initially without warning. Over time, the brake pedal had become stiff upon depression with several warning lights illuminated on the instrument panel. The vehicle was taken to an independent mechanic where a code reader confirmed a defect with the braking system. The vehicle was then taken to another independent mechanic where the vehicle was diagnosed with a defective brake booster. The mechanic then informed the contact of the federal safety agency Campaign Number: 13V235000 (Service Brakes) which was linked to the failure. The dealer was notified of the failure and informed the contact that the vehicle was not included in the recall. The manufacturer was notified of the failure but offered no assistance. The vehicle was not repaired. The failure mileage was approximately 153,000.

Filed May 7, 2024 · Brakes · CA

I’m encountering multiple dash lights with the brakes being very unreliable and no that’s no regenerative breaking. I checked with an obd2 kit and the app shows that I have a code C1391.

Filed Jan 11, 2024 · Brakes · KY

All the lights on my dash board came on suddenly, and the brake emergency, traction control and ABS lights stayed illuminated. Upon exiting the interstate I could not come to a complete stop at the end of the exit, which was very scary. Fortunately the cars driving on the road the exit merges into did, so we avoided a terrible accident. The brakes were spongy and not operating properly after that. The next day with all the lights still on, I slowly drove (20 mph) to the local Toyota Dealer , who claimed that error code (C1391) was being displayed and according to Toyota, that means the Booster is or will be leaking. Therefore the Pump and Booster needs to be replaced (estimated at $3K). No lights or errors were given before the incident, the brakes just suddenly malfunctioned. However Toyota apparently is aware that the booster and pumps fail without warning, because I discovered with an on-line search that code had a "customer extension" warranty (by googling the code C1391), I called customer service but they refuse to help. They claimed I was mailed a letter in October 2018 (they didn't offer to supply a copy.) However, I never received a letter or any notice from Toyota or the Toyota dealer that I have repeatedly used since I bought the car in 2010 (I have had brakes replaced there when it was under 150k and no one said anything!) Now they are stating that the extension has expired as it was only good up to 150,000 miles or 10 years which ever came first. I can't understand why they have a known brake issue and not replace the part when the vehicle is already at the dealer (It's there for every oil change 3 x a year!) Brakes are an important part of a vehicle, a failure like this should have been recalled, and Toyota should have been made to replace the faulty parts!

Filed Nov 27, 2023 · Brakes · CA

While operating the vehicle at normal highway speeds, the car suddenly had the ABS, Traction Control, and Brake lights all come on. The vehicle did not operate or sound any differently at the moment all the lights came on. However, over the next week there developed a mild humming coming from somewhere in the engine bay approximately behind the dashboard. My mechanic identified the problem as the brake booster and pump assembly failing and informed me that the vehicle may drive normally for sometime but the brakes will fail suddenly once the brake booster and pump fully fail. Thus, making operating the vehicle extremely dangerous. I am currently waiting for a Toyota specialty mechanic to become available to replace the brake booster and pump assembly at a cost of +$3,000. Please investigate this issue, there are many people experiencing this issue with the 2010 Prius models.

Filed Dec 26, 2022 · Brakes · TX

My 2010 is covered under a recall. I had total brake failure and the dash light up like a Christmas tree. Brought in before the recall was released and it was repaired under my extended warranty. Then got recall notice, so I guess there was an internal fund transfer.

Filed Sep 2, 2022 · Brakes · TN

My brakes are failing. The brake booster leaks. The stopping distance is greater. All the warning lights are on on the dash. Error code C1391 on the unit. Two dealers would not repair it under warranty or recall. They gave me a price of $2600-$2800.The situation still exists. The car has had the engine replaced out of warranty but by the dealer but the brakes were not replaced as a preventive measure.

Filed Aug 9, 2022 · Brakes · CA

After descending a long mountain highway in our 2010 Toyota Prius and coming to a stop at the bottom the brake pedal travel suddenly increased, brake effectiveness decreased, and many dashboard lights suddenly came on including the brake system warning light and stability control system light. The next morning the dealer diagnosed a brake booster failure and prescribed replacement of the brake booster and master cylinder. Since this was a safety issue we had them do the work at a total cost to us of $3,363.93. They covered a rental car for us for only part of the repair period, which took 2 weeks.

Filed Aug 4, 2022 · Brakes, Electrical · CA

Hello there, my name is Lashyrah and I do not know much about cars so most of this is unknown. The person I bought my vehicle from did not give me much information and I was desperate at the time so I bought it. Most of the lights on the dashboard are on: ABS, Brake system, Engine, Tire/Safety Alert, Fuel pump reset warning, and Stability control are lights that come and go. I have used the code system to try to reset these things and they go away then pop back up. Sometimes while I am driving, all the dashboard lights disappear and the breaks start getting really touchy and it feels completely different driving until the previous lights all come back on. This has been an issue before and when I last went to Toyota to get my car serviced, I asked them to check the lights and system, and if they could do a multi-point inspection. They wanted me to pay $300 just to find out why the lights keep coming back on. Please help me get this fixed at no cost I am a single mom and college student working part time so I need my car to get around or a free loaner car to get around until this is fixed. I strongly feel these are recalls that did not get taken care of or are not showing up in the recall system. I need assistance as soon as possible and would like to know my options, especially after getting a notice in the mail a few days ago from Toyota about my car possibly being affected. My fuel gauge is also empty at around 3 bars or sometimes 2 bars instead of going all the way down to empty, costing me more money on gas having to fill it up more often. Thank you for your time and help.

Filed Aug 1, 2022 · Brakes · CA

About 3 weeks ago, I was driving down PCH around Manhattan beach , California. Suddenly the dashboard lit up like a Christmas tree , the ABS light , Brake light , pre-collision system light and a yellow triangle with an exclamation point in the middle all turned on at the same time , and a loud beeping alarm went off inside the car that was deafening and most importantly the brake pedal turned very hard I had to stand up on it just to slow down to brake and my braking distance tripled . I almost hit the car in front of me . I had this terrible feeling that the car isn’t safe to drive . It feels like the brakes failed. Luckily there was an autozone nearby so I pulled in their parking lot and borrowed a code scanner . C1252 , C1253, C1319 was the codes that showed up all indicating that the abs system failed and the results is recommending to replace the brake booster pump and the abs module. There’s also a leak of some kind within the abs system. I brought it to an independent auto shop near my residence and the shop told me that the and power brake booster and the abs module needs to be replaced . The repair will cost $2.000 to get fixed in which I can not afford. I was able to seek help from my siblings and was able to come up with $1200 . So I’d figured the shop owner might be able to let me pay half first and half in 2 weeks or so when the car is fixed. But when they replaced the 2 parts with brand new ones ..yhe ECU isn’t communicating with the ABS module . The shop suggested that we bring the car to a Toyota dealership to get it diagnosed to figure out why the abs system is still faulty even when the abs power brake booster and abs module were replaced with new ones . Toyota dealership said they will charge $795 just to diagnose it . I almost passed out in shock.. I haven’t worked since the brakes failed on my car and I can’t afford to pay for the repair . Please help.

Filed Jul 31, 2022 · Brakes · KS

while driving on 01/31/2022, I noticed several warning lights came on suddenly on the dash and heard intermittent beefing noise while driving. I took my car to the dealership and they found M R&R brake booster and booster pump needs to be replaced and they informed me that recall warranty time of that equipment has expired and I paid for it to be replaced costing me $3539.76. Toyota motor company told me that they are not responsible to repair or replace it.