Ok it must be iilumo... I have the same issue.. my left drl doesn't work and I ended up thinking it was the wire that plugs into the assembly... see pic.. replaced it today and it is the same issue. they both worked at very first install and then after driving it went out and never came back...
I have had the armytrix high flow with cel simulator with a jb4 it had thrown a cel after about 200 miles I deleted it through jb4 and it hasn’t come back after 300 more miles.. will let you know if it comes back.
Has anyone tried these? do they work?
https://kinglyday.com/products/car-oxygen-o2-sensor-adapter-cel-fix-check-engine-light-eliminator-m18-1-5-1pc?variant=42911563219075