PERFORM SYSTEM SCAN: P0134 NO B1S1 LAMDA ACTIVITY AND P0130 B1S1 LAMDA CIRCUIT MALFUNCTION. MONITOR ALL DATA DURING ROAD TEST. ENGINE PERFORMED NORMALLY. INSPECT COMPONENTS AND PERFORM TESTS. THE FRONT OXYGEN SENSOR SIGNAL, SUPPLY AND HEATER CIRCUITS HAVE GOOD CONNECTION AND ARE WITHIN RANGE. HARNESS DOES NOT HAVE ANY DAMAGE. SUGGEST KIA UPSTREAM OXYGEN SENSOR REPLACEMENT.
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