Yellow DSC & "Brake" lights illuminated

[Cadeez]

I'm sure there's a thread out there for this, but I can't find it... I've been having intermittent issues with the DSC & "Brake" lights coming on together in yellow, pic below. I googled it and came up with tons of forum pages, with everyone giving their own opinion of what they think it might be. The most common (and most realistic) fix seemed to be the DSC Pressure sensor (https://www.ecstuning.com/b-genuine-bmw-parts/dsc-pressure-sensor/34521164458/). Has anyone gone through this, and how did you fix it? This doesn't affect the drivability of the vehicle at all, just a small beep when it comes on. No, I haven't taken it to my local shop to get the codes ran yet, I don't have any time to do that right now. Thanks

https://c1.staticflickr.com/5/4198/34979483626_bf644440de_b.jpg

[Vas]

Had a similar issue on the wife's car in the past. At first it was intermittent but then it became pretty constant

I scanned the car and it had a code for the brake pressure sensor 1 ( there are two of them ) Ended up buying the sensor and installing it ( kinda pita ) and then a brake bleed since the sensors sit right on the master cylinder.

Other people had luck with just cleaning the wheel speed sensors or doing a brake fluid flush so there is new fluid in the system. I tried those methods but replacing the sensor was the fix for me. ( Only did 1 sensor since they are not cheap but if a shop was doing it, I would have replaced both )

Keep in mind when the dsc system is disabled when both lights are on the cluster. So the system is inactive.

[Cadeez]

Hey Vas, I think one of the old forum posts I read on E46Fans was yours haha. But yeah, adding brake fluid and wheel speed sensors were the other popular vote getters. I really don't feel like spending $90 at a shop for them to plug it in, so I'll start small with a fluid check and go from there. I wondered if the DSC would be disabled, and that makes sense because I had a pretty solid bark in 2nd gear this weekend while getting after it :)

[san]

Fluid flush fixed it for me

[holyc0w]

I think I had the same light combination. The mechanic replaced the steering wheel angle sensor. Before that they cleared the light, but it returned. For me, I think the lights were constant from the beginning or became constant pretty quickly.

[Vas]

Hey Vas, I think one of the old forum posts I read on E46Fans was yours haha. But yeah, adding brake fluid and wheel speed sensors were the other popular vote getters. I really don't feel like spending $90 at a shop for them to plug it in, so I'll start small with a fluid check and go from there. I wondered if the DSC would be disabled, and that makes sense because I had a pretty solid bark in 2nd gear this weekend while getting after it :)
Keep us updated

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[theothersawyer]

Mine does this for the wheel speed sensors. They become dirty over time and throw the code. If you wash the car and make sure to spray some water toward the inside of the wheels it'll go off!

Yes the DSC does turn off! I tested it by launching the car one day! Haha

[slater]

you reeeeally need to scan it. it could be a variety of sensors. steering angle sensor, wheel speed sensor (aka ABS sensor), lateral acceleration sensor....

scan it. then let us know what it says.

[Cadeez]

Keep us updated

Yessir


Mine does this for the wheel speed sensors. They become dirty over time and throw the code. If you wash the car and make sure to spray some water toward the inside of the wheels it'll go off!

That seems a bit sensitive! I've never had this issue on my previous cars and I wash the crap out of my car at least once a week. But, you never know


you reeeeally need to scan it. it could be a variety of sensors. steering angle sensor, wheel speed sensor (aka ABS sensor), lateral acceleration sensor....

scan it. then let us know what it says.

I know... I just have zero time during the week, and running to the shop is a hassle.

The lights are off today, so who knows what's up. I'm going to check the brake fluid and wheel sensors this weekend, see how that goes and go from there

[johnrando]

Funny we had the same issue near the same time. I did not see this post. I will clean mine and see how that worked.

[Cadeez]

My lights have now been off since my last post and not reappeared, hopefully my problem has been solved!

[holyc0w]

That's the best kind of solution. :D

[cornercarver]

Just thought I'd chime in here as a data point; These lights illuminated on my '04 a couple of weeks ago after driving in some heavy rain/ hitting a few large puddles. They went out the next time I started the car, but came back shortly afterward, same day. A day later they went out (presumably because the warm weather and driving it for a day dried everything) and have not come on again. I'm inclined to believe it is directly related to the sensor(s) getting wet.

[kayger12]

Add me to the list. Came on yesterday and stayed on through several stops and restarts throughout my day. First lights thrown in 7 years of ownership.

[johnrando]

Bummer Keith. I cleaned my sensors and they are still on.
Going to read codes tomorrow.

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[kayger12]

Bummer Keith. I cleaned my sensors and they are still on.
Going to read codes tomorrow.

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Ugh-- at least we're going through it together, Lol.

I have to take her out after work today, so we'll see what I get.

[///Mvious]

I just had the trifecta come on in my car (yours plus the ABS light)...took it to my indy for a diagnostic, and it's apparently the ABS Control module...They are sending it in to be refurbished ~$300...but it was $90 for the diagnostic...2.8 hours will be charged for taking it off and putting it back on, and $60 for insured shipping there and back. ~$700...it hurts!

[theothersawyer]

Mine came on again, but I haven't washed the car in a few weeks.

[johnrando]

Looked at codes w William today, says it was brake sensor. We look in the brake fluid repository, and the fluid is low. Turns out I slightly misread the manual based on color but it was also slightly confusing. All good now. Hope yours heals.

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[kayger12]

Looked at codes w William today, says it was brake sensor. We look in the brake fluid repository, and the fluid is low. Turns out I slightly misread the manual based on color but it was also slightly confusing. All good now. Hope yours heals.

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Good to hear, Rando. After 100+ miles of driving, mine hasn't returned. I'm sure that won't be the last of it...