Seatbelt light and airbag light on no reason? UPDATE 4/2/18

The code is logged in the ecu but can be cleared.

 

Have had my Tacoma since October '21. First time with a passenger after:
1. Seat Jackers installed.
2. VLED Footwell lights installed.

I have had passengers in the vehicle since purchase. Not sure about Seat Jackers, but DEF not since the VLED install.. I only did the fronts, so did NOT remove anything for the backs (yet).

Anyone have ideas? Light is obviously out when there are no passengers. The "NOT ON" light comes on only... Not the one of the left (the knee light?). Seat Belt light in instrument cluster not coming on (when passenger belt is buckled), but air bag NOT ON light still comes (stays) on...

Puzzling....

 

Well, maybe not.

User's manual indicates that there are 4 amber lights for the front passenger air bags.. Two for the driver, and two for the passenger.

The 2018 manual, page 45, labels these as 1 through 4. 3 and 4 are for the passenger.

Light "4" is the one that is on when there is a passenger in the seat. It is labeled as the "AIR BAG ON" indicator light, and has a picture of a car seat with a no-circle. Seems as it would be "normal" for this light to be on when a passenger is in the passenger seat.

Am I right here? Seems peculiar that this would always be lit (for hours on end) when there's a passenger riding shot-gun... Yellow lights to me imply "You better look at this...."