On two different highway trips I have got DTC B1904 (Air Bag Crash Sensor #2 Feed/Return Circuit Failure). When this happens the truck goes into limp mode with the CEL on and it's quite annoying and dangerous. Luckily I wasn't towing a trailer or I would have been in serious trouble as you can barely get out of your own way. When you clear the code it runs fine. Are there actual sensors somewhere near the front bumper because I've looked and found nothing or are they built into the airbag assembly? I'm assuming that Sensor #1 would be driver's side and #2 the passenger side. Both airbags were replaced under a recall in the last couple of years. Since I don't want the airbags going off I'll probably have to take it to the dealer but hoping someone can add some insight as to what is happening. Thanks.