Conditions for Setting the DTC: P1133
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
- The ECM detects that the HO2S 1 sensor rich-to-lean counts, or the lean-to-rich counts are less than a calibrated value.
- DTC P1133 sets within 100 seconds when the above condition is met.