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#1
09-16-2017, 12:40 AM
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Trans Failsafe Prog today
3.0 M54 with GM Transmission.
Got the "Trans Fail Safe Prog" across the bottom of the cluster + yellow brake light today after only driving 5 mins. Car felt like it had loss of power for split second a couple of times (not a trans slip) and changed up and down through the gears fine otherwise. Error message still up when reached destination, turned ignition off and on again-error message had cleared. Scanned for codes when I got home- TCM code "97 CAN status, fault" ? Scanned all other modules on the CAN circuit (DME, DSC, Cluster etc) no other codes. Voltage fine with ignition off and on (12.4v & 13.9v) Took it for a drive and monitored a few things with the scanner- Brake switch activation OK. All trans activations working as they should, All speeds sensors reading correct etc. Cleared code. Took it for a drive up around a Mountain pass to load it up, trans ran and shifted flawlessly. No warnings or codes since. I replaced the trans fluid when I first got the car about a year ago- 3x drain and fill with Valvoline Maxlife ATF, new bmw filter. Never any issues before today. Anyone experienced anything similar? Any ideas what might have caused that one off situation?
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2003 E53 3.0 2001 E46 330ci Msport 2001 E46 325i Touring wagon Last edited by NZBM; 09-16-2017 at 12:47 AM. 
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#2
09-16-2017, 02:38 AM
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Well from what I can tell you have a bad brake light switch at the brake pedal.
Well going bad as it didn't pop back up instantly.
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Just BMW's - All cars and trucks was two pages long 1994 318is 1997 528i 2000 323i 2001 X5 3.0 auto 2005 X5 3.0 auto 2011 535xi auto 2013 X5 xdrive35 Turbo More are at my website Aftermarket E53 Radio Install
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#3
09-16-2017, 02:54 AM
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I had that once in my e38 (5HP30). Battery nap and I never saw it again.
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2005 E53 4.4i 2003 E53 3.0d (Mrs) 95 E38 740iL (sold)  93 E32 735i (sold) 91 E32 735iL (sold) 93 E34 535i (sold) 89 E34 525i with M30B35 conversion (sold)
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#4
12-10-2017, 02:56 AM
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Fitted a new BMW brake switch at the pedal and all seems well now.
Not sure if the old one was failing or the adjustment had been disrupted, but so far so good with the new switch 
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2003 E53 3.0 2001 E46 330ci Msport 2001 E46 325i Touring wagon
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