11-18-2020, 11:07 AM | #1 |
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4x bizarre errors - anyone had this?
Hi guys,
Pulled out of my garage today and got some weird errors all at once that I can't figure out. Here's what I'm getting: 1. Chassis Stabilisation "drive moderately" 2. Daytime Pedestrian Warning Limited "brake intervention not possible, but visual and acoustic warnings are still active" 3. Frontal Collision Warning System "Malfunction. Brake intervention not possible. Visual and acoustic warnings active." 4. Brake system: "stop carefully" DSC light on. Other points to note: - Car stops fine and pedal feel is good but with the above errors, it won't let me change drive modes. - I changed out my pads a few weeks back (fronts and rears) and have had no problems. A couple weeks back my race shop did a full fluid flush, also no problems. I have always had the sensors disconnected as I track the car, so I'd be surprised if this is some sort of brake sensor issue as I've never had that happen. My forum research to date points to various issues this could be across different BMW platforms. Some have said the errors go away after a restart (mine didn't) or after leaving the car for a few hours (I'll see if that helps). Some have said it's due to the sun causing issues with the camera in front of the rear view mirror that controls the collision systems - or the cam itself being faulty - and/or a faulty sensor somewhere around the rear diff (?). Others have noted more serious things like getting their steering rack replaced (!!?) which just seems crazy to me. My car is an '18 M2, I've had no problems with it till this. Any insight appreciated - thanks. |
11-18-2020, 01:05 PM | #2 |
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This indicates a problem with the Stability Control/Traction control/ABS system. It’s all one unit.
Is the ABS or TCS lights on? Or just Dynamic Stability Control? Could be an input to the system like Yaw Rate Sensor, or a CAN connection problem. Did you have all the codes pulled? I would expect a more specific fault code for a sensor or communication issue |
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11-18-2020, 01:06 PM | #3 |
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Also a wheel speed sensor problem could cause it too. Did you inspect the wires going to the wheels when you changed pads? How are the pad wear sensors looking?
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11-18-2020, 01:36 PM | #4 |
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Just want to echo 5.M0NSTER, pulling the codes will be your best bet. The errors you're getting also are similar to what comes up after coding the ECU so they correspond to a whole host of failures.
The code will be the quickest pointer. Regardless it does sound like something may need to be fixed, best of luck. |
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11-18-2020, 04:21 PM | #5 |
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Might wish to have your dealer put it on a electrical check for full voltage...a lowering battery can bring up dash signs that though it runs OK...its not got enough vitamins. Yours is an 18 M2, so batt ought NOT be an issue...but it could be as simple as that. We have had that.
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11-18-2020, 05:09 PM | #6 | |
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Agreed Exactly why my battery is always plugged in when my car isn't being driven
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11-18-2020, 05:25 PM | #7 |
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Drives: 2018 M2 Alpine White
Join Date: Jul 2007
Location: Lake Erie
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I had a bunch of failures like this on my 135i once and come to find out the trunk was full of water somehow and it fried everything.
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11-20-2020, 12:05 AM | #8 |
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Think I found the issue. Rear left caliper leaking fluid badly, bleed nipple screw not tightened. Master resovoir almost dry! That said good chance air is in the system and I have a feeling the caliper being emptied led to the other codes. Taking it back to my shop, they are going to flush it and pull codes and see what we find.
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11-20-2020, 12:08 AM | #9 | |
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Do you guys know if these errors are able to be cleared without me having to go to the dealer? We will pull the codes but I’m not aware of what happens once you find the problem. If we flush the lines and get it back to normal is there a chance these warnings just go on their merry way and disappear? |
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11-21-2020, 12:30 AM | #10 |
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Reporting back for anyone that might ever have the same problem. We did a full flush then manually pumped more clean fluid through each line and removed a lot of air from the system. Pulled the various codes, cleared them, went for a drive and the car is back to normal. Hopefully stays that way. Thanks for the replies to my initial post !
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12-02-2020, 08:53 AM | #12 | |
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12-02-2020, 10:50 AM | #13 | |
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Dealer records are your friends, just make sure you go over the jobs line by line and think that they accurately reflect the history of the issue. I often make them rewrite them to ensure that what I am signing is accurate. A little bit of effort now can be worth tens of thousands if things go wrong later. |
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12-06-2020, 02:05 PM | #14 |
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The bleed nipple wasn’t “completely” loose but it was far from secured. The pedal didn’t feel great but it wasn’t to the floor. I think had it been one of the front calipers it would have been much more noticeable.
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12-06-2020, 02:07 PM | #15 | |
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