I have a 2016 T&C Touring and the airbag light comes on during starts, flashes off, then comes back on constantly. I had the codes checked at a body shop - U11EA and U1213 both lost communication with impact acceleration sensor, Left B pillar on the former and left door track on the latter. They tried to clear them but the problem remained unsurprisingly. I cleaned and reseated the 3 yellow wiring connectors I could find under the drivers seat to no avail, and the bundles seem to be in pretty good shape. Any ideas before I throw in the towel and take it to a pro?