A computer program embodied on a computer readable medium, the computer program containing instructions which, when executed by a processor, perform {HEAD ~ the following method} for diagnosing {TAIL ~ a catalytic converter}: 
A computer program embodied on a computer readable medium , the computer program containing instructions which , when executed by a processor , perform { HEAD ~ the following method } for diagnosing { TAIL ~ a catalytic converter } :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH