Left pedal showing 0 value power

I just reinstalled my Garmin Vector 2s power meter. However the left side pedal is reading either a 0 value power, or a very low power.

I already put brand new batteries on both pedals, calibrated the pedals, and did a zero offset. I did the latter by pedaling at cadences around 80-100 rpm, however because I use a Wahoo GPS, it doesn’t give much info about how to do it or if there is something else that needs to be done. I also torqued the pedals properly.

Before I uninstalled the pedals, they were working perfectly.

Any help will be appreciated

Thanks