DTC P0153: Bank 2 Ho2S No. 1 Circuit - Slow Response - 2.5L: Condition

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.