Kokum9395 wrote: ↑

Tue Sep 28, 2021 7:50 pm

...I checked the fuse for the heated oxygen sensors I believe there is only one I could be mistaking, it looked OK. I don't understand what's going on it could be something with the connector itself?

...

Yes, there might be other issues ranging from a bad sensor to air and vacuum leaks; but I specifically wouldn't trust a fuse merely by how it looked. I have been let down by fuses that passed both my visual and simple continuity tests.

I find it simple enough to switch a suspect fuse with one from a location where it would be very obvious if the fuse had an issue.
For example, in my 11 M56 the O2 sensor fuse is located in the IPDM behind the battery. I would switch that 15 Amp fuse with the fog lamp fuse (after testing the fog lights beforehand, of course).

I'll try that. Thanks

Get something like this:

https://www.harborfreight.com/612v-circ ... 63603.html

Even swapping fuses will not tell you if the fuse has power or not. The only correct way to check fuses is with a bulb-type test light, because the bulb consumes power and thus tells you that the fused circuit can carry power.