Transmission Malfunction

02420X3 · 07-10-2018, 09:30 PM

I was presented with this error message earlier this evening. My X3 is almost completely locked out. The engine won't start, I can't read out codes through the ODBII port, and I can't pull up anything useful through iDrive. About the only thing that I can get to work is the radio.

Anyone seen this error message before?

Scout10 · 07-11-2018, 12:38 PM

Sure have ? ? . . . . . . but where is it ? ?

say cheeze

02420X3 · 07-20-2018, 08:47 PM

As with many things on modern BMWs, it was an electrical problem. It had nothing to do with the transmission. The not-so-technical explanation from the SA was that my X3 was crashing the CAS module when I pushed the start button and it tried to wake up. After many hours of diagnostics, the problem turned out to be both the starter and the starter ground strap. From the service report: "when the starter is unplugged KL15 stays on" (this is good). Also "found starter ground strap corroded causing voltage to bleed into VTG and taking out KL15WUP signal".

07-10-2018, 09:30 PM	#1
02420X3 Captain 63 Rep 983 Posts Drives: 2011 X3 35i Join Date: Jun 2011 Location: Boston iTrader: (0)	Transmission Malfunction I was presented with this error message earlier this evening. My X3 is almost completely locked out. The engine won't start, I can't read out codes through the ODBII port, and I can't pull up anything useful through iDrive. About the only thing that I can get to work is the radio. Anyone seen this error message before?
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07-11-2018, 12:38 PM	#2
Scout10 Second Lieutenant 86 Rep 268 Posts Drives: 2017 BMW X3 X28i Join Date: Apr 2017 Location: S.W. Michigan (stalag michigan) iTrader: (0)	Sure have ? ? . . . . . . but where is it ? ? say cheeze __________________ 2017 BMW X3 x28i SOLD 2015 Honda CRV-EXL AWD 2019 Honda CRV-Touring AWD 1965 Chevrolet Corvette 327 / 4spd Convt
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07-20-2018, 08:47 PM	#3
02420X3 Captain 63 Rep 983 Posts Drives: 2011 X3 35i Join Date: Jun 2011 Location: Boston iTrader: (0)	As with many things on modern BMWs, it was an electrical problem. It had nothing to do with the transmission. The not-so-technical explanation from the SA was that my X3 was crashing the CAS module when I pushed the start button and it tried to wake up. After many hours of diagnostics, the problem turned out to be both the starter and the starter ground strap. From the service report: "when the starter is unplugged KL15 stays on" (this is good). Also "found starter ground strap corroded causing voltage to bleed into VTG and taking out KL15WUP signal".
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