In looking for DEF head alternatives so we are prepared in a failure, ran across a post from a OTR driver who found a temporary solution to avoid needing a tow.
Disconnect the speed sensor at the drive shaft.
Yes, as the driver you no longer know your speed, but more importantly, the computer doesn’t know your speed either. For his OTR trucks this has allowed him to keep going and avoid a tow.
Going to crawl under our rig so IF we have a derate I can try this 5 min temporary fix.
Still following these other alternatives too.