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DTC P0139, P0159 HO2S2 EC-243 C D E F G H I J K L M A EC
2005 Pathfinder 4. CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Check harness continuity between ECM terminal and HO2S2 terminal as follows. 2. Check harness continuity between the following terminals and ground. 3. Also check harness for short to power. OK or NG OK >> GO TO 5. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 5. CHECK HEATED OXYGEN SENSOR 2 Refer to EC-243, "Component Inspection" . OK or NG OK >> GO TO 6. NG >> Replace malfunctioning heated oxygen sensor 2. 6. CHECK INTERMITTENT INCIDENT Refer to EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" . >> INSPECTION END Component Inspection UBS00K78 HEATED OXYGEN SENSOR 2 With CONSULT-II 1. Turn ignition switch ON and select “DATA MONITOR” mode with 2. Start engine and warm it up to the normal operating tempera- 3. Turn ignition switch OFF and wait at least 10 seconds. 4. Start engine and keep the engine speed between 3,500 and 5. Let engine idle for 1 minute. DTC Terminals Bank ECM Sensor P0139 74 1 1 P0159 55 1 2 Continuity should exist. DTC Terminals Bank ECM Sensor P0139 74 1 1 P0159 55 1 2 Continuity should not exist. SEF174Y |