Diagnostic Aids

Normal scan tool voltage varies between 0.15 to 8.5 mV while in Closed Loop. If DTC P0140 is intermittent, refer to Intermittents  .

Fig 1: DTC P0140 - Downstream Heated Oxygen Sensor Bank 1 No Activity Detected Diagnostic Chart (1 Of 2)

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: DTC P0140 - Downstream Heated Oxygen Sensor Bank 1 No Activity Detected Diagnostic Chart (2 Of 2)

Courtesy of SUZUKI OF AMERICA CORP.