Sensor Missing; Warning on Repeat

It should not be doing that. The message should only appear once in an activity unless the battery value recovered and then dropped again.

Is it possible you have a lose battery door on the pedals.

It probably recovered & dropped as the batteries slowly died? I have replaced the batteries, so I'm good until next time.

I have this exact problem and my right vector pedal does have a door that doesn't tighten fully, ie. it just gets to a certain tightness and then just spins around. But even then, why would it keep triggering the warning on the head unit? If the battery was dead, you said it should only appear once per session. If the door is not tight enough and not sending the expected data, what difference does that make? It's not like the Vectors have a 'loose door' sensor and matching warning.

You could be getting intermittent battery connecting with the faulty door not being tight enough.

I would need to see the FIT activity file.

I'm assuming these are Vector 3 pedal bodies. It sounds like the thread in the pedal body is stripped. You may need to replace the pedal body. You can put the Rally pedal bodies on a Vector 3 spindle. The Rally pedal bodies have a metal thread liner in the pedal body so are much better.

IDK.  I've had some other sensors keep getting warnings. To stop the warnings,  I went into Sensors, selected the sensor and disconnect it  That stopped the warning, but of course I no longer got the data.  At one point, I found that connecting via blue tooth rather than ANT+ solved the problem.