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This is exactly what I mean about O2 codes and interpreting them; P1126 means the sensor cannot richen up the mixture enough to get the fuel mix back inbounds, probable causes: low fuel pressure or vacuum leak. P1133 indicates an overly lean condition (below lower limit for mixture). P0450 indicates the EVAP system at the fuel tank is giving an “implausible” pressure/vacuum value.
The first two point to an overly lean mixture, probably caused by a vacuum leak in the EVAP system in the passenger’s side wheel well, next to the fuel filler, as indicated by the third code. There are multiple valves, sensors and a bunch of vacuum lines on the EVAP system (which captures and allows the engine to consume fuel vapors from the tank). Anyone of them can be the culprit.
But in any case, your O2 sensors are fine.
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