E90/E91/E92/E93 (2006 - 2013)
Trying to diagnose an o2 heater CEL.
Replaced all 4 sensors 2 weeks ago. Started blowing my f4 fuse for the heaters, and I think the crank vent heater.
Rather than rummage under the manifold I though, maybe I can isolate the ccv heater.
Turned on the car, revved to 5000, fuse blew again...