"Accelerator and Brake Pedals Depressed Simultaneously" error light

Sounds like a easy fix.

Welcome to TW
and happy first post.

 

I’ve had this happen for the second time, now. In my case, unplugging the brake controller solved the problem. If I remember right, the first time this happened I was also driving in snow.

 

Same thing happened to me the other day. Message popped up, lost power for a second while message was showing. Thanks to this forum thread I looked to see if I had a brake light out and sure enough I had a burnt out brake light. Ran down to Toyota got a new light bulb and bam no more issue! While I was at Toyota I went to the service guys and asked them what could be wrong and showed them this thread and they told me changing a brake light bulb wouldn't fix it. I think the both agreed it was some kind of brake actuator, lol. Anyway thanks guys...

 

So now we can't set the wheel over a puddle of oil and power brake it with a bald tire on it, till it pops.

 

My 2019 tacoma TRD was installed with MESO CUSTOM stage 1 taillight kit with MESO resitors. Recently had the on dash message "brake pedal and accelerator depressed simultaneously" and that triggered the vehicle into limp mode while driving at night, which is no more than 5 mile/hr. This only happens at night time, when all lights are on. Upon looking up online forums, there are many ppl facing this issue, most cases are related to 2017 and up.
Upon inspection of the taillights, I noticed one of the bulb was not fully lit. It was about 50% dimmed and brake function was not working for the defective bulb. All the other 3 were 100% functional. I switched out the defective bulb with another aftermarket led bulb and since then, the problem seems to be resolved.

 

Is the same wiring and programming used in the 2022? The truck can decelerate because of a shorted brake light?

 

Same problem with my truck. Seems to be the same programming in my 2022 SR5 Trail Edition bought in April of 2022. Was out for dinner with the wife tonight waiting at a light of a busy intersection, our light turns green, I press the accelerator, and the truck moves to about 5 mph then stops accelerating entirely. The same “braking and accelerating simultaneously” error message pops up on the dash; however, I know 100% that I did not depress both pedals simultaneously at any point. We then limped into a parking lot to find that the brake lights were all stuck on except one bottom in the right tail light. We then limped 20 minutes back home. Luckily the truck seemed to ignore this error after 20 mph and could keep up in traffic. It was only initial acceleration and a big rig coming the other way on a left turn that almost gave us real trouble - just had to pump the acceleration to keep the truck moving. We threw on the hazard lights to keep from looking like lunatics with brake lights on while doing 50 mph. Taking the truck to the dealer tomorrow, can’t wait to hear their BS.

 

UPDATE 1: Took the truck to the dealer at 6AM the next morning, didn't get it back until 4PM that day. They reported it was a wiring issue and it was not correctly installed when the truck was manufactured. They had to rewire some portion of the light assembly wiring. Of course, they said this was covered under warranty. Drove the truck off the lot at 4PM and the truck drove fine until night came. After dark, the auto headlights switched on and the same error started happening again with the same symptoms, stuck brake lights, error message, and limping truck under 20 mph.

UPDATE 2: Took the truck back to the dealer at 6AM this morning, told them that the problem only occurred when the headlights are switched on. After 2 hours they called me asking "who installed the bed stiffeners?" to which I responded "me" and they then informed me that I had broken one of the tail lights when installing the bed stiffeners (keep in mind, the truck drove fine for a few weeks after installation). Obviously, no longer covered under warranty and charged me $425 for all the work from the two days. When driving away, the malfunction was no longer occurring. So, I would say it is difficult to presume foul play from the dealership, especially seeing that we noticed a light out the night before; but, the fact that the truck was driving fine for a while and the dealership claimed it was a different issue on day 1 leaves considerable doubt. Cannot rule out that it was a faulty light that the dealer then smacked with a hammer (removed light was in rough shape) to make it look like I broke it when installing the stiffeners.

Moral of the story:

1) Either the 2022 Tacoma tail lights break like egg shells upon standard removal and reinstallation and your truck will run fine for an unknown amount of time or, if the dealer sees you have installed aftermarket items in the vicinity of the issue, they will purposefully break your tail lights, claim that you broke it when installing aftermarket items to void your warranty, and receive payment.

2) If this error occurs, try replacing the bulbs in your tail lights first before going to the dealer. If that doesn't fix it, still don't go to the dealer.

 

can you elaborate? I have replica led headlights, stock tail lights and my truck tends to have this problem of cutting all power under full acceleration intermittently.

 

Just to corroborate this thread...I had the same dash light / loss of power mode yesterday out in the sticks. Turned my headlights off and problem went away. Got to love all these electronics.

 

I had this issue last week. Dry out, I was at a stop light. No mods regarding lights at all. As I accelerated, I got the error, forcing me to pull over. The issue didnt go away until I started the truck 6 times (found a thread here that actually suggested that). That took care of the issue. Also, I drive a standard, not sure that makes a difference.
Odd thing is, I HAVE stepped on both the brake and gas at the same time-as, well, its a standard....never ONCE had that issue.
I have since driven probably close to 1000 miles since that, with no issues at all.
Weird.

 

Had this problem happen to me yesterday. Drove the truck at 10am and it was fine, went to drive later around 8pm and this warning popped up and put me in limp mode. Found this thread this morning and as soon as I got home from work I figured I’ll check the brake bulbs sure enough one looked a bit sketchy but it still worked but I changed it anyway and low and behold my truck works fine again. It’s crazy to think that a little light brake bulb can almost immobilize these trucks. Here’s a picture of the bulb, the top filament had unwound or whatever you call it but it was still producing a light.

 

I had the same error on a 18’ taco. An interesting symptom that I noticed was that if I turned on my headlights and pressed the brake pedal, then my interior lights (PRNDL indicators and climate controls) would dim.

Initially, the dealer blamed it on a missing fuse (EFI #2). I’m not sure why it was missing, but it is what it is. They replaced it, but that didn’t resolve the problem.

The second time around they figured out the issue. It turns out that the issue was related to the third brake light on my camper shell. The installer spliced into the driver’s side tail light to power the camper shell brake light. They rewired the shell brake light (not sure how/where) and it hasn’t turned on since.

By the way, this wasn’t covered by warranty, because the wiring was ‘modified.’

 

Just wanted to add to this older thread that this just happened to me. And thank you to those folks who actually believed the original poster that he was NOT hitting both the brake and accelerator when this message came up. I was recently rear ended. Minor damage but busted rear right tail light. For two weeks it drove fine. Now today getting the error message non stop. Totally dangerous as the engine cuts out and I lose all power. Imagine pulling into an intercetion or making a left and that happening. Overly protective computer causing more problems then helping. The broken taillight is somehow causing the error signal.

 

2017 Toyota coming off a stop light and scared me to death middle of intersection. After all the research my left brake bulb was out. I had no brake lights at all while lights were on. When I turn off lights cab and right brake worked. Crappy and dangerous design flaw!

 

Just wondering if anybody with aftermarket taillights/headlights had this problem?

 

power launches are no longer allowed!

 

It could be related to having an aftermarket replacement light assembly, as mine was replaced. The other thing
machotaco91 mentioned above, the symptoms changed when my lights were on I had no brake lights at all, and then when I turned them off, the other brake light started to work. With lights on, none of the brake lights came on.

I was at the light the other day, and a truck had the reverse lights on, and when I told him, he said yea, after-market light assembly.

 

Story time, as I just went through this saga on my '17. Conclusions at the end.

For a week or two, I would get a "Check ABS System" warning on the dash on startup... sometimes. The lights would stay on for the duration of the drive most times, but occasionally would turn off mid-drive.

On one drive, I got a warning saying that "Accelerator and Brake Pedals Depressed Simultaneously", which they weren't. I immediately grabbed the underside of the brake pedal with the toe of my boot to pull it up, in case it had gotten stuck, and the warning went away.

This made me think that both these issues were the result of a faulty brake pedal switch, so I scanned the code and got a C1425 "Open In Stop Switch Circuit".

One morning, I am heading pulling out of the driveway with the "now usual" ABS warning, and as soon as I hit the gas to pull out onto the road, I got the "Accelerator and Brake Pedals Depressed Simultaneously" warning and an immediate limp mode. I limped the truck back to the driveway, pulled the brake pedal switch, and it looked to me to be stuck.

I disassembled the switch, cleaned it up, and it looked fine. It moved freely and looked okay on my multimeter, so I popped it back into the truck and the issue went away.

The next day, I had the same issue, but pulling/cleaning the pedal switch didn't fix it and I had to drive a different car to work.

Frustrated that my assumed fault didn't seem to actually be the problem (or at least the only problem), I did some digging and found this thread.

I have aftermarket or customized lighting everwhere on the truck, and have for years. Morimoto XB headlights, MESO mirror lights, MESO stage 2 tail light harness with LED bulbs. Nothing in that setup has changed in the past year or more, so I am puzzled as to why I am suddenly having trouble if my problem is like what others reported earlier in this thread.

I then pulled both tail lights to inspect the bulbs and wiring, in case something started corroding or was otherwise causing a new problem. What I found was a cracked bulb socket for one of the brake/running light positions.

The bulb still worked fine for both running and brake lighting, but it wasn't holding the bulb as tightly as its intact brothers, and it wasn't holding onto the taillight housing like it should have been either, since part of the base has cracked and fallen off as well. Since I didn't have any other leads, I just unplugged that socket entirely and went for a drive.

No warnings. No issues.

I ordered a replacement socket overnight from Amazon and replaced it first thing in the morning, along with the brake switch (just in case). No issues in the past 3 days, whereas I would never go 2 trips without a warning before.

Conclusion: It seems as though a cracked tail light bulb socket, probably coupled with an LED bulb, caused an open to be detected in the stop switch circuit. This only occurred when the lights were on, which I didn't realize at the time, and would have explained why I didn't always have the problem or why it would go away mid-drive (auto headlights). I never associated the issue with lighting, and many of my trips are during twilight hours (either morning or stormy Florida summer afternoon), so the lights were usually automatically on.

I don't know when the bulb socket got cracked/damaged, but I didn't see debris around, so maybe I damaged it sometime in the past and then forgot about it. That's not my style, but I can't explain it better. I also don't really see what about the damaged socket should have caused a problem, since it was working. I can't argue with the problem having gone away with the repair, though.

Rant: Can we stop with this nanny crap on cars? An unarguably minor fault made my truck undrivable. Who cares if I want to drive around all day long with my foot hard on the brake and gas at the same time? Let me decide how to operate my truck, even if it damages it. Never have I thought I'd appreciate the reliability of my old BMW over my relatively new Tacoma.