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mr gill

Joined: 21 Feb 2011
Posts: 188
Location: The Black Country

PostPosted: Mon Jun 19, 2017 10:02 am    Post subject: Abs + Psm lights Reply with quote

Morning all, last year I had my front discs and pads changed, there was an issue with the caliber so the car was jacked up for a week or so until I fixed the caliper. After I got the car back the dreaded lights came on.... but after a few days driving and the car not being jacked up on an angle the lights went off. I used to leave the 996 at my moms but this year I have left it on my heavily slopes drive, and hey presto the lights have come on again! Are they somehow linked to the car being on an angle for extended periods of time?[/list]
2004 996 C4S X73 and Aerokitted
2007 Alfa 159 sportwagon 1.9jtdm decat, dpf/egr delete
Gone but not forgotten 2002 E46 M3
7 more 3 series BMW.... (yes I like them!)
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Joined: 26 May 2015
Posts: 223

PostPosted: Mon Jun 19, 2017 10:38 am    Post subject: Reply with quote

Don't know exact answer, but, last trip to the 'Ring, in the wet, on several laps, my ABS and then PSM threw up errors as the car came up out of the concrete banking on Karrussel.

Each time it said "ABS error" and then, when I'd 'okayed' that on the trip computer, it then said "PSM off". It all re-set fine after each occasion.

My thinking was slippy conditions and unweighted wheels - front offside, then rear nearside - exiting the banking was the cause, but I don't know for sure whether the tilt/gradient played a part.
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Joined: 06 Nov 2013
Posts: 131

PostPosted: Mon Jun 19, 2017 11:20 am    Post subject: Reply with quote

I had the same thing. Did a bit of googling and the most likely candidate is the brake switch at the brake peddle (the button that activates the brake lights/turns off cruise control). I changed it out but didn't solve it. Put it on the fault code reader and it showed up as the brake switch again, did a bit more research and turns out it's a common fault, not the switch but the cables going to the switch wear out behind the dash/bulkhead. I would start there.
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