CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P2A00)
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE EGR VALVE)
CHECK WHETHER DTC OUTPUT RECURS (DTC P0401)
INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE)
CHECK HARNESS AND CONNECTOR (AIR FUEL RATIO SENSOR - ECM)
PERFORM CONFIRMATION DRIVING PATTERN
CHECK WHETHER DTC OUTPUT RECURS (DTC P2A00)