crf450r

Getting the P1167 code on my 2001 Accord 2.3 (F23A4 engine). I swapped out the original O2 sensor for a Bosch Universal (#15734) and reset the MIL light. Thought the problem was fixed but MIL light came back on about 2-3 minutes into the test drive. When I start the car the heater circuit registers 14v for a couple seconds then drops to 11v and stays there. Has anyone successfully used the Bosch 15734 in this engine? Any other ideas? Before I clipped the wires on the original sensor I was getting good voltage fluctuations, from .15 to .95 so I think just the heater was cooked. Is there a fuse or something upstream in the heater circuit that is prone to failure?