ABS, braking power low and drive start control malfunction lights

[Ih8fizzix]

This just happened now. On my 2020 SR5 4x4 with 11k miles.

Display says anti lock system malfunction visit dealer. braking power low,drive start control failure visit dealer.

Will take it in Monday when the dealers open. Has this happened to anyone before? I drove the car this afternoon and moved it from the drievsy to the street. Wife got in to drive it, and called me saying all these warnings are lit up. So random. She’s driving it now and says it’s driving fine, not sure if it’s because it’s brutally cold here so sensors are just acting up. It’s been between 0 and like 10 degrees all day and the car sits out.

 

[Ih8fizzix]

Tried to switch it from 4wd to 2wd and back to see if it was anything related to that and now it says 4wd malfunction!

 

[Ih8fizzix]

Update:

Dealer called and said a 2021 4Runner came in on Saturday with the same issue and that they’ve already done a wheel bearing and master cylinder on it and still not fixed.

He said on mine they’re going to start with a brake booster and that it won’t be here until earliest Friday. He said on the 2021 the brake booster is backordered and won’t be here until the 25th.

In the meantime I’m driving around a 2020 Rav4.

 

[Ih8fizzix]

Just in case anyone cares, it was a failed master brake cylinder. They replaced it under warranty. They also found a bent brake line. I had to pay out of pocket for that.

 

[rightyouareken]

Just in case anyone cares, it was a failed master brake cylinder. They replaced it under warranty. They also found a bent brake line. I had to pay out of pocket for that.

Yikes, that's an expensive part. I had to replace one on my 2001 3rd gen 4Runner and the part was over $2k. I haven't seen many failures pop up on 4th and 5th gens which use a similar design boost pump/accumulator setup, but hopefully it's less common than the old 4Runners and Landcruisers which had lots of issues with them as they aged.

 

[Tbasse01]

Looks like they replaced the whole booster instead of the pressure sensor

Guaranteed it was the sensor or bad connection no way a master cylinder is dead after 11k

Reminds me of the master cylinder fiasco at gm dealers in the 80's and 90's pedal going to floor and they say replace master cylinder .... Then again in 6 months pedal going to floor replace master cylinder

*** All they had to do was adjust the automatic brake adjusters in the rear that never adjusted properly**

How many people got ripped off with that

 

[Ih8fizzix]

Looks like they replaced the whole booster instead of the pressure sensor

Guaranteed it was the sensor or bad connection no way a master cylinder is dead after 11k

Reminds me of the master cylinder fiasco at gm dealers in the 80's and 90's pedal going to floor and they say replace master cylinder .... Then again in 6 months pedal going to floor replace master cylinder

*** All they had to do was adjust the automatic brake adjusters in the rear that never adjusted properly**

How many people got ripped off with that

Yeah I initially thought it was probably sensor related especially since it was so cold out. And especially since another T4R was towed in for the same issue. Do you think if it was the master, it failed Bc of the badly bent brake line? I went off roading a few weeks ago and pretty sure I bent it when I came down on a rut pretty hard.

 

[Tbasse01]

Yeah I initially thought it was probably sensor related especially since it was so cold out. And especially since another T4R was towed in for the same issue. Do you think if it was the master, it failed Bc of the badly bent brake line? I went off roading a few weeks ago and pretty sure I bent it when I came down on a rut pretty hard.

Might have effect on pressure and flow with it being bent, but if it was bent almost like a kink I don't think the sensors would like that at all and do all sorts of stupid things

 

[jim4runnerny]

Old post, but I just had this exact issue occur on my 2020 4WD 4Runner Limited with 15000 miles. I have an appointment on Monday to have this looked at. Note that it happened to me after the vehicle sat for a day in cold weather (~10-20 degF). I'll let you all know if it ends up being a master cylinder for me as well.

Jim

This just happened now. On my 2020 SR5 4x4 with 11k miles.

Display says anti lock system malfunction visit dealer. braking power low,drive start control failure visit dealer.

Will take it in Monday when the dealers open. Has this happened to anyone before? I drove the car this afternoon and moved it from the drievsy to the street. Wife got in to drive it, and called me saying all these warnings are lit up. So random. She’s driving it now and says it’s driving fine, not sure if it’s because it’s brutally cold here so sensors are just acting up. It’s been between 0 and like 10 degrees all day and the car sits out.

 

[moes4runner]

Old post, but I just had this exact issue occur on my 2020 4WD 4Runner Limited with 15000 miles. I have an appointment on Monday to have this looked at. Note that it happened to me after the vehicle sat for a day in cold weather (~10-20 degF). I'll let you all know if it ends up being a master cylinder for me as well.

Jim

just had this happen on my 2021 limited too minutes ago, did you ever figure out what it was? same deal as everyone else, sat out in the cold and then started it and got these messages

 

[Charles Bronson]

just had this happen on my 2021 limited too minutes ago, did you ever figure out what it was? same deal as everyone else, sat out in the cold and then started it and got these messages

This is hilarious. I just dropped my wife's 2020 TRD ORP with 20K miles at the dealer for these exact messages. She got the messages after driving around for an hour in ~15 degree weather. The truck sits in a garage all night, but the garage was probably 35 degrees last night. Not exactly super cold.

 

[Charles Bronson]

jim4runnerny or moes4runner,

Do you have any updates to what Toyota did to fix this issue? The tech thought it was a wheel sensor so he replaced it and the issue is still there.

 

[Charles Bronson]

The tech says the electronic ABS/brake controller is bad and has ordered one. I'll update this thread once the repair is done and note if it fixed the issue.

 

[Kries40]

Following ….my 2021 4runner limited with 9000 miles is doing the same thing.

Drive start control malfunction
Pre-collision system malfunction
Braking power low (ABS and Brake light on)
All wheel drive system malfunction

Live in Ohio where its cold and snowy

 

[Charles Bronson]

The part the tech ordered won't be here until 2/16. So now the 4runner sits for nearly 2 weeks. I dont know if this is a COVID thing or if this is because so many later model 4runners are experiencing the same issue and the part is in high demand.

There is definitely a fault with the ABS when this happens because when the issue popped up, I went out and did some hard braking and back end would lock up and want to swing around. I couldn't feel any sort of ABS pulsating in the pedal. When I scanned the ECU for codes, nothing showed up.

 

[4r-4ever]

i have the same issue that popped up 2 days ago.

The part the tech ordered won't be here until 2/16. So now the 4runner sits for nearly 2 weeks. I dont know if this is a COVID thing or if this is because so many later model 4runners are experiencing the same issue and the part is in high demand.

There is definitely a fault with the ABS when this happens because when the issue popped up, I went out and did some hard braking and back end would lock up and want to swing around. I couldn't feel any sort of ABS pulsating in the pedal. When I scanned the ECU for codes, nothing showed up.

 

[JMRussell]

2020 ORP, 16k miles. I just got off the phone with a couple dealerships cause I need a loaner if my 4runner is going to be in the shop for a few days. Same messages, brake power low, pre-collision malfunction, abs malfunction on the instrument panel. Cruise control malfunction if I try and use it while the messages are up. My messages will come and go, with no real pattern to it. Other than not having traction control or abs, it drives just fine.

Codes I scanned were C1468, C1469, C146A and C146B. Seems to be abs solenoids for each wheel. Hopefully whichever dealership I end up at can resolve this quickly.

 

[Charles Bronson]

This is so weird that I've heard nothing about this issue in two years and now all of a sudden a number of 2020/2021 4Runners on this forum are having the issue within the same week!?!?!? If so many of us on this forum are having the issue, then there must be hundreds more experiencing the same issue not on the forums. It's awfully strange.

 

[Charles Bronson]

2020 ORP, 16k miles. I just got off the phone with a couple dealerships cause I need a loaner if my 4runner is going to be in the shop for a few days.

We got a Highlander loaner and the service guy said we're looking at 2 weeks in it.

 

[jim4runnerny]

jim4runnerny or moes4runner,

Do you have any updates to what Toyota did to fix this issue? The tech thought it was a wheel sensor so he replaced it and the issue is still there.

Hi all,

They ended up replacing a major wire harness in my vehicle to resolve the issue. Whatever it was, they had to pull the back seats out to do it, as I drove around without the seats secured while I waited for the part to come in. I'll check my receipt to see if a part number was called out.

I suspect the wire-harness was common between all the sensors acting up, so they decided to replace it. I asked if there was rodent damage (chewing), and they said no, and alluded to all the high speed data travelling in the harness and it is not something that can be repaired, only replaced.

It has been really cold out and I have not seen the issue since the repair, so fingers crossed it is fixed. Good luck!

Jim