This invention relates to {TAIL ~ automotive internal combustion engine exhaust gas sensors} and, more particularly, to diagnosing operation of {HEAD ~ an exhaust gas sensor} 
This invention relates to { TAIL ~ automotive internal combustion engine exhaust gas sensors } and , more particularly , to diagnosing operation of { HEAD ~ an exhaust gas sensor }
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD