u/AdMaximum4929

Hey all.

I made a post already for another issue but this is a continuation and i don’t know what else to do. It’s a 2018 BMW M550i

One morning it started perfect and then it just shuts off on auto start stop in the middle of the road. Got it to go again but had drivetrain malfunction and a CEL. So I pull codes and get some waste gate and charging ones which I resolved.

But I’m also getting crankshaft position sensor: general los of synchronization, direction of rotation implausible, and faulty.

So I replaced the sensor and I’m still getting the same codes. I did the reset adaptation, I checked the wiring from the sensor to the DME , everything is good. I’m stumped…

Hey all! All of a sudden today while driving and coming to a stop at a red light, the auto start stop kicked in shut off the engine put the car in neutral and then wouldn’t start. It will crank and try, but it would not run. Let it sit for about five minutes, turned off the power started it again and it drove for about 20 minutes. Everything was OK but less powered than normal.

Then on the way home (about 40 minute drive) at first no engine, light or drivetrain malfunction and had full normal power, however towards the end, the car went in limp mode and would not go faster than 10 mph or 1100 RPM. That happened after a short burst of heart acceleration.

There is an engine light on and a drivetrain malfunction on the iDrive.

Got the car home let it sit and cool down for a bit attempted starting again and it would not start after about 10 attempts. It would start but not smooth and while running it cut every now and then.

I don’t have my good scanner with me. However, I do have a Bluetooth OBD that I plugged in and pulled a couple codes that all attach as pictures. Fuel pressure looks good no misfire codes.

I’m stumped.

The video is 3 videos but Reddit spliced them into one, first shows attempting to start (yeah I know , hard on the starter) second is running but fan at max, third is running and sounds good but won’t rev past 1100rpm and cuts out randomly.