CEL Light Code 172

[drew1095sho]

does anyone know what code 172 is? I ran a test on it and that's what code it informed me of,the cel comes and goes like most sho's,car seems to run fine bue i did notice a littlre bit of a rough idle any help would be appreciated.

 

[ohfosho]

right or rear oxygen sensor is not switching....bad O2 sensor. change both

 

[drew1095sho]

right or rear oxygen sensor is not switching....bad O2 sensor. change both

thanks i order new sensors today and willl replace both and go from there.