The Volvo V40 Mk2 has been the subject of a few recalls. One concerned a coolant leak, which could cause a fire. The cooling system caused a second recall, because air could become trapped in it, so an extra bleeding hose had to be fitted. A software fault that could cause a rear light to fail to function had to be addressed, as did a plastic
the code is referring to a heater circuit malfunction on the after cat sensor. the heating circuit is fused, but this is unlikely to be a fuse issue as it shares the same fuse as the pre cat sensor, though it may be a wiring problem somewhere between the fuse and the sensor as the sensors run seperate wires from the fusebox.
8BBr. 12 115 114 111 435 346 50 204 138