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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 06-11-2013, 01:59 PM   #1
andybimmer
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M3 dsc light stuck on???

Hi guys after alittle help with my m3 after a long drive to Germany I had the dsc light come on and now won't go out the car has been scanned and came back with three fault codes
152 dsc switch
161 rotation rate sensor
180 steering angle
I have tried a dsc switch from a mates m3 and still the same, any help would be great on this.
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Old 06-11-2013, 02:53 PM   #2
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Get an alignment.
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Old 06-11-2013, 03:25 PM   #3
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Really? Nothing's changed really on my car?
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Old 06-11-2013, 03:34 PM   #4
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I'll bet its either an alignment or your front steering angle sensor took a **** judging by the codes you posted. I mean ****, I just had new tires put on and it pissed my DSC off to the point where going around a corner and barely being on the gas trips my DSC to kick in.. had to reset the system. I'm sure that the angle sensor is just as sensitive once it starts to see your alignment specs pushing towards being "faulty"
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Old 06-11-2013, 04:42 PM   #5
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Quote:
Originally Posted by Moosecakes View Post
I'll bet its either an alignment or your front steering angle sensor took a **** judging by the codes you posted. I mean ****, I just had new tires put on and it pissed my DSC off to the point where going around a corner and barely being on the gas trips my DSC to kick in.. had to reset the system. I'm sure that the angle sensor is just as sensitive once it starts to see your alignment specs pushing towards being "faulty"

DSC coming on after installing new tires is caused by the mold release that is part of the outer rubber. It wears off. You need to dial-down your driving a little until it does. DSC is operating normally because the tire IS slipping.
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Old 06-11-2013, 04:58 PM   #6
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DSC coming on after installing new tires is caused by the mold release that is part of the outer rubber. It wears off. You need to dial-down your driving a little until it does. DSC is operating normally because the tire IS slipping.
I am aware of that, but I have made at least 250 miles worth of trips since install. how long does it typically take? And unfortunately they aren't the best tires... ss595 federals. I needed tires and buying the car unfortunately tapped me for the time being so I had to get something cheap and fast. I imagine those tires aren't up to the task of handling it plays a factor as well?
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Old 06-11-2013, 05:17 PM   #7
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I'm wondering if its a faulty or a dirty wheel sensor as this seems to be the most common fats for the dsc?? If a wheel sensor was faulty would that put up the abs light???
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Old 06-11-2013, 05:22 PM   #8
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DSC + Brake light is the typical symptoms of a faulty or dirty wheel speed sensor. Just the DSC light, and based on your codes, again, your alignment is off, or your actual steering angle sensor took a dump.. One of which is slightly expensive.

Do this.
1. Test Battery & alternator to ensure low voltage didn't just shock your system
2. Clean wheel speed sensors - Go test car
3. Test wheel speed sensors with volt meter, there is a DIY for this.
4. If dead sensor replace. Pretty cheap.
If all sensors good,
5. 4 wheel alignment
If that still doesn't work,
6. Steering angle sensor pooped out on you, replace.

That's starting at the cheapest fixes first. Hopefully it's as simple as an alignment or dirty wheel speed sensor.
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Old 06-11-2013, 06:09 PM   #9
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That's what I'm thinking! Great info mate. How would I test the wheels speed sensors??
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Old 06-11-2013, 06:21 PM   #10
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I can't recall, but you'll need a volt meter, and there is a DIY, search "testing wheel speed sensors e46" and you'll find it.
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Old 06-11-2013, 06:25 PM   #11
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Thanks I seemed to of found a link for testing. To re calibrate the steering wheel angle is that a bmw only job? My friend has the latest snap on scanner would that do it? Do I need to input any codes to calibrate it?
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Old 06-11-2013, 06:49 PM   #12
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Honestly as long as the shop you take the car to isn't retarded and gets correct oem specs, it should reset itself, my 330ci did when I had it aligned, toe was wayyyyy out from adding spacers and lowering more. I tested my wheel speed sensors and they were all fine so I prayed it was just an alignment. Turns out it was.

There is a tool you can buy, that's relatively cheap, take that with you to the alignment and have them use it to ensure proper BMW spec's.
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Old 06-12-2013, 03:47 AM   #13
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That 161 rotation rate sensor is that a wheel sensor as it comes up on a google search as sometime a rpm sensor??? Getting alittle confused with all these sensors! Any helps great guys.
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Old 06-12-2013, 01:54 PM   #14
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Update car was back on the scanner cleared all fault codes re calibrated the steering angle and still the same light on?? Unplug a wheel sensor to test it but my friend could see on the scanner they were all showing a dreading and in a straight line the read the same once moving but I now have the abs light on? Also checked on the scanned and could see the dsc switch working fine so now I'm at a loss as to what's causing the problems??
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Old 06-12-2013, 05:24 PM   #15
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Wheel speed sensors monitor each wheels RPM to ensure both are spinning the same, otherwise there is slip and DSC does it's job. Now that you have the ABS light I am almost 100% positive you need to replace your wheel speed sensors. Unless you are 100% positive they are fine, you have an ABS unit issue and that's not cheap.. did you have your alt and battery tested for faults? Low voltage causes tons of issues. **** that's all I got to help lol, good luck man..
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Old 06-12-2013, 05:46 PM   #16
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Thanks for the help and info. Ok so I just went out to move the car and this time no light on when started moved the car and went up the road still no light then it came on turned it off again stated back up no lights left it running and wasn't till I started to move the dsc light came back on no abs now so must be a mooring part that's causing it to come on my thoughts has to be a wheel sensor??
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Old 06-12-2013, 05:49 PM   #17
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That's got to be it, someone is loose or dead/dying. Pull negative terminal for about 10 mins and let your car's ecu reset itself. while you have it disconnected, make sure all the wheel speed sensors are tightly connected and that all of your tires are up to spec. Reconnect the battery and see how that goes. That should clear all the issues and whatever's left should point you towards a problem.
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Old 06-12-2013, 05:51 PM   #18
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Ok will try first thing in the morning I have two rear wheel sensors so that's my next plan to change them
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Old 06-14-2013, 07:17 AM   #19
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If your steering wheel is hanging to the left or right, chances are you need to change your front wishbones. Once these have been changed the steering will align the way it should. Getting wheel alignment when you have suspension component out will not cure things. This happened to me therefore check this out too.
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Old 06-14-2013, 07:19 AM   #20
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Ok an update both rear wheel speed sensors done still the same! If I stay under 10mph the light won't come on as soon as I go over bang light on?????
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