1997 Honda Civic HX 1.6
258,000 miles (highway)

I just got back from a failed emissions test. The fault codes I received at the emissions center were P0401 and P1337. Telling me I have "Exhaust Gas Recirculation Flow Insufficient Detected" But, when I connect a paper clip to the OBDII and read the flashes I get 1 short flash, telling me it's the O2A oxygen sensor #1. This makes no sense. why is the emissions center giving me P0401 and an at home test giving me a O2A fault?