DTC P1134: Ho2S Transition Time Ratio - Bank 1, Sensor 1: Description

PCM monitors Heated Oxygen Sensor (HO2S) activity for 100 seconds. During this period, PCM counts number of times that HO2S switches from rich-to-lean and lean-to-rich and adds amount of time it took to complete all transitions. With this information, an average time for all transitions can be determined. PCM then divides rich-to-lean average by lean-to-rich average to obtain a ratio.