DTC P1154 - Ho2S Transition Time Ratio Bank 2, Sensor 1 (Front): Notes
WARNING: This page is about a different car, the 1996 Cadillac Seville, 1996 Cadillac Eldorado, and 1996 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For circuit reference, see DTC P0131 schematic.