CF80 Code.

[Zulu95]

CF80 - signal from engine management setpoint-torque request

Anybody any insight as this is a little vague and the web is all over the place on causation/remediation?

2013 E70 LCI xDrive35i

[andrewwynn]

Chassis/engine please.

[ard]

Originally Posted by Zulu95

2013 E70 LCI xDrive35i

Im gonna guess 35i E70


Unless zulu edited it after the fact....

[andrewwynn]

Pretty sure that was added on.




I'm finding results tired to transfer case oil wear but nothing definitive. One YouTube video where the guy changed his TC fluid due to that exact error but never followed up in the comments if the error went away.

It feels like a related symptom error like trying to figure out a random cyl misfire actually from weak CPS.

The error is vague and seems to imply slip in the TC which is why the guy changed the fluid.

Are you like me heavy foot driver?

[Zulu95]

Edited just after your initial comment and emphasized earlier today.

This is the continuing story of the "Peyton Place" car. There was a 3K RMP limit for the first 500 miles and we were adhering to a limited rev rule until we had 1K miles on the engine. We are now somewhere around 700 miles due to so many other problems post rebuilt engine install.
The transfer box has around 71K miles on it and has been driven moderately by my wife for most of the time since we bought it in 2018.
There were zero problems with anything mechanical prior to the ill fated gaskets update last November that resulted in a blown engine. It sat from November until late April or early May before we got it back with the rebuilt engine.
It is now going into a local BMW specialist indy for diagnosis and then we'll decide on the repair process. No check engine light just the code revealed by the Foxwell 510.

[andrewwynn]

It seems fairly minor but that the direct read of the code says the DME/egs/DSC are not in agreement with the math on the speeds of input and output of the trans/TC/wheels. There are a good handful of sensors involved.

Good call to have somebody with experience take a look vs. just interwebs. I know I can figure out how to get my wheels aligned but after replacing all my suspension and tires, I definitely hired an expert to set the initial go. I can fine tune from there if desired.

[Zulu95]

i just rescanned and got a slew of codes along with the CF80. EC4, 6DA4, E2C7, A7C9, E20F. I hope we are not dealing with the FRM and the TF box!
All codes cleared and did not return but all I did was drive into the garage as we are expecting a hail storm any minute!

[andrewwynn]

Usually when you get a whole fruit salad of codes it's a voltage problem.

Not sure if e70 has the extra voltage regulator the V8 e53 had (IVF I think it's called in the ebox), but when those go on e53 you will get all sorts of misbehaving.

Update your profile shows 3.0 2001 that's why I asked above which chassis/engine.

[Zulu95]

My signature below the message panel has the updated listing. That could be getting updated again!