DTC    P0031    Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1)

DESCRIPTION

MONITOR DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT AIR FUEL RATIO SENSOR (HEATER RESISTANCE)

INSPECT RELAY (Marking: A/F)

INSPECT ECM (HA1A AND HA2A VOLTAGE)

CHECK WIRE HARNESS (A/F SENSOR - ECM AND A/F RELAY)