CX11 Service Required Error E521

Problem:

I'd like to know if anyone has seen this particular error or knows the meaning of it on the CX11NF.
Service Required Error E521
I am unable to clear the error. I beleive it may be an engine type error based on the noise at startup.


Solution(s):
Service Required E521 error:
BTR 2 Error
The input of 2nd BTR Retract Sensor does not change when 2nd BTR is initialized.

There area couple of things that cause this problem. I would suggest you obtain a service manual from
http://www.TheServiceManualShop.com
If you don't see your manual listed, drop them a line to see if they can email it to you.

Hope this helps