DTC P0153: Bank 2 Ho2S No. 1 Circuit - Slow Response - 2.7L: Condition
WARNING: This page is about a different car, the 2003 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0153 is set when time for Bank 2 HO2S No. 1 to change from lean to rich or from rich to lean is longer than specified when engine is at idle. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles.