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DTC P0138, P0158 HO2S2 EC-807 [VG33E] C D E F G H I J K L M A EC 2. 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 ECM terminal or HO2S2 terminal and ground as follows. Refer to Wiring Diagram. 3. Also check harness for short to power. OK or NG OK >> GO TO 3. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 3. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT 1. Check harness continuity between HO2S2 terminal 4 and engine ground. 2. Also check harness for short to power. OK or NG OK >> GO TO 5. NG >> GO TO 4. 4. DETECT MALFUNCTIONING PART Check the following. ● Harness for open between heated oxygen sensor 2 and engine ground. >> Repair open circuit to ground or short to power in harness or connectors. 5. CHECK HO2S2 CONNECTORS FOR WATER Check heated oxygen sensor 2 connector and harness connector for water. OK or NG OK (With CONSULT-II)>>GO TO 6. >> Repair or replace harness or connectors. DTC Terminals Bank ECM Sensor P0138 56 1 Bank 1 P0158 57 1 Bank 2 Continuity should exist. DTC Terminals Bank ECM or sensor Ground P0138 56 or 1 Ground Bank 1 P0158 57 or 1 Ground Bank 2 Continuity should not exist. Continuity should exist. |