Yes the JB4 has the CEL clear for the O2 sensor, but it keeps it in Not Ready state. In Texas I can't have more than 1 sensor in a Not Ready/Failed state. I had to disable the JB4 for my inspection last month because I guess there are 3 sensor readings for O2 alone, which automatically is a fail.
2011 E90 335i LCI // Jet Black / Beige Dakota Leather / Dual STEPTRONIC DCT / Premium / Sport
Mods // Cobb Stage 2+ Aggressive / ER Charge Pipe / AR 4" Down Pipe / AA FMIC / LUX H8 v3 Angel Eyes / HPB Interior LEDs
Other // Mann Oil Filter / Shell Rotella T6 5w40 (3.5k OCI)