A fault condition characterized by {HEAD ~ the sensor} operating outside {TAIL ~ the current limiting range} of operation in which sensor output current indicates the concentration of oxygen in the engine exhaust gas is diagnosed when a significant signal content is detected at the fixed frequency 
operating outside
A fault condition characterized by { HEAD ~ the sensor } operating outside { TAIL ~ the current limiting range } of operation in which sensor output current indicates the concentration of oxygen in the engine exhaust gas is diagnosed when a significant signal content is detected at the fixed frequency
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH