I think the last truck I drove had adblue cheating device

Darkside:
I am intrigued the OP will work through his breaks, and drive what he thinks are poorly maintained trucks, but worries about being done for an Adblue cheat.

Where have I said that I work/ed through my breaks? They didn’t give me a tour of their trucks/yard before I started working there (as an agency driver on a day-to-day basis), I picked on these things on different occasions and overhearing conversations between drivers and TMs. It’s not like I worked for them for years, it was a 3 and a half day gig in all. My landlord doesn’t care if I had work that week, he wants his rent paid.