Hello, all. new here. I did search beforehand, but no one seems to have ONLY this code. I was coming off of the highway and the car shut off, coming up with transmission failure, and all-wheel drive/DTSC shut-off messages. I limped it home (with the transmission being in limp-home mode) and hooked up my cheap code reader, finding only P1727. When I restarted my car again, the code was gone, and it shifted ok for about a block before going into limp mode again. Drove again shortly after and it shifted OK and made it home again without problem. I have to drive it to work tonight, and home in the morning. Definitely going to take it easy, but anyone have an idea of what's going on?

 

I didn't have that code but had similar symptions. A new crank position sensor fixed me up. Does it take longer to start than usual?

 

That is definitely a crank position sensor error. Did you google the code to see what it told you?

 

I did google the code, but since it seems this code is usually accompanied by other codes, I wasn't sure if this would be an unusual case since it was by itself. It isn't taking any longer to start up than normal, at least I don't think so. Drove it to work and back last night, (20 minutes each way) and it hasn't come back.

 

So the sensor has not completely went out. I would suggest replacing it before it does. Below site gives lifetime warranty on all parts.

07 530xi CPS

 

changes the crank shaft sensor. worked for week in my 07 550i with 143k miles. a speeding turtle was moving faster than me but once I made it to 3rd gear I was good. needles to say my car is in the shop getting tranny with 65 k miles on it right now. i had the same issue with my 04 530i at 118k miles. needless to say I learned how to drive on a bad tranny all the way to 258k miles

 

changes the crank shaft sensor. worked for week in my 07 550i with 143k miles. a speeding turtle was moving faster than me but once I made it to 3rd gear I was good. needles to say my car is in the shop getting tranny with 65 k miles on it right now. i had the same issue with my 04 530i at 118k miles. needless to say I learned how to drive on a bad tranny all the way to 258k miles

 

Until it goes into limp-home mode, the transmission shifts fine. It does have 185,xxx miles. Went off again today on the way home from work, coming up to a light that was changing. sort of split the difference, and accelerated, then braked and it came back on. Stalled again, too. I'm taking it to my indy shop tomorrow.

 

I had the same issue in both my 04 530i and my 07 550i

 

Indy has verified, cps was going out. Thanks, everyone!