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Home >> Nissan-Datsun >> 2010 >> Rogue SL, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 To P0442 (CALIFORNIA) >> DTC P0146: Ho2S3 >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

The heated oxygen sensor 3 has a much longer switching time between rich and lean than the air fuel ratio (A/F) sensor 1. The oxygen storage capacity of the three way catalyst (manifold) causes the longer switching time. To judge the malfunctions of heated oxygen sensor 3, ECM monitors whether the voltage is unusually high during various driving conditions such as fuel cut.

Fig 1: Heated Oxygen Sensor Voltage Pulse (Malfunction A)
G04875072Courtesy of NISSAN MOTOR CO., U.S.A.
DTC DETECTION CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0146 Heated oxygen sensor 3 circuit no activity detected An excessively high voltage from the sensor is sent to ECM.
  • Harness or connectors (The sensor circuit is open or shorted)
  • Heated oxygen sensor 3
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