CHECK OTHER DTC OUTPUT (BESIDES DTC P0136, P0137, P0138, P0156, P0157 AND/OR P0158)
READ DATA LIST (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR)
INSPECT HEATED OXYGEN SENSOR (HEATER RESISTANCE)
INSPECT INTEGRATION RELAY (MAIN RELAY)
CHECK WIRE HARNESS (HEATED OXYGEN SENSOR - ECM)