Component Inspection

Engine

Engine Control - P2196 O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1) - Component Inspection

Component Inspection

1. Check the condition of HO2S
(1) Check HO2S for poor connection or loose terminal.
(2) Check if HO2S is ensurely installed.
(3) Is the conditions of HO2S normal?





2. Check the Signal waveform of HO2S
(1) IG "OFF" and connect HO2S connector.
(2) Engine start.
(3) After warming-up, monitor signal waveform of HO2S with scantool.




Fig 1) Signal waveforms of front HO2S (the upper) and rear HO2S (the lower)
(4) Is the sensor switching properly?






NOTE:
There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by PCM. Before or after testing PCM on the vehicle, use this function to reuse the PCM on the others