2011 135i Several Lights and Codes

zmangum17 · 03-15-2024, 10:51 AM

I recently got a lot of work done on my 2011 135i Convertible M Sport to include new battery, valve cover gasket replacement, valvetronic system replaced (shaft, motor, etc), and MAF sensor replacement. I've had it back for a couple of weeks now and have been driving it normally. Just today as I was driving it a host of lights came on including the "ABS", "BRAKE", and DTC indicator light (pic attached). They are all yellow. From what I've read this could be due to a host of problems. I was doing some of the DIY fixes I found and went to go drive it again to test if any of the fixes helped and I started having issues with shifting. I was only going about 20-30 MPH and the transmission threw a light and shifted straight from 1st to 7th gear. I just drove it straight back home and parked it (I had only driven a few hundred feet down the road from my house). The CEL is not on but on a whim I connected my OBD2 reader to see if there were any pending or stored codes. And I came up with a few. It is throwing P0716 (turbine speed sensor A), P2766 (turbine speed sensor B), and P15C9 (right rear wheel speed sensor). This all seems to be random at first glance but I have a gut feeling it is just my PCM failing. Anybody have any thoughts on this? Am I at least in the ballpark with my thought process?

Josh-PA · 03-15-2024, 10:56 AM

I'd guess its your wheel speed sensor. If the car isn't getting good info from teh 4 wheel speed sensors, it can't properly calculate ABS and traction control thresholds. Sometimes the axle rusts and takes out teh sensor.

zmangum17 · 03-15-2024, 11:28 AM

Would that cause issues with the transmission shifting erratically?

03-15-2024, 10:51 AM	#1
zmangum17 Registered 0 Rep 2 Posts Drives: 2011 BMW 135i Join Date: Mar 2024 Location: Alabama iTrader: (0)	2011 135i Several Lights and Codes I recently got a lot of work done on my 2011 135i Convertible M Sport to include new battery, valve cover gasket replacement, valvetronic system replaced (shaft, motor, etc), and MAF sensor replacement. I've had it back for a couple of weeks now and have been driving it normally. Just today as I was driving it a host of lights came on including the "ABS", "BRAKE", and DTC indicator light (pic attached). They are all yellow. From what I've read this could be due to a host of problems. I was doing some of the DIY fixes I found and went to go drive it again to test if any of the fixes helped and I started having issues with shifting. I was only going about 20-30 MPH and the transmission threw a light and shifted straight from 1st to 7th gear. I just drove it straight back home and parked it (I had only driven a few hundred feet down the road from my house). The CEL is not on but on a whim I connected my OBD2 reader to see if there were any pending or stored codes. And I came up with a few. It is throwing P0716 (turbine speed sensor A), P2766 (turbine speed sensor B), and P15C9 (right rear wheel speed sensor). This all seems to be random at first glance but I have a gut feeling it is just my PCM failing. Anybody have any thoughts on this? Am I at least in the ballpark with my thought process? Attached Images
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03-15-2024, 10:56 AM	#2
Josh-PA Second Lieutenant 950 Rep 294 Posts Drives: 991.2, n55 e88, B58 G05 Join Date: Jul 2019 Location: SEPA iTrader: (0)	I'd guess its your wheel speed sensor. If the car isn't getting good info from teh 4 wheel speed sensors, it can't properly calculate ABS and traction control thresholds. Sometimes the axle rusts and takes out teh sensor.
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03-15-2024, 11:28 AM	#3
zmangum17 Registered 0 Rep 2 Posts Drives: 2011 BMW 135i Join Date: Mar 2024 Location: Alabama iTrader: (0)	Would that cause issues with the transmission shifting erratically?
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