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DTC P0139, P0159 HO2S2 EC-261 C D E F G H I J K L M A EC 3. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch “OFF”. 2. Disconnect heated oxygen sensor 2 harness connector. 3. Check harness continuity between HO2S2 terminal 4 and engine ground. 4. Also check harness for short to power. OK or NG OK >> GO TO 5. NG >> GO TO 4. 4. CHECK HEATED OXYGEN SENSOR 2 Check the following. ● Harness connectors E315, F5 ● joint connector-29 ● harness for open or short between HO2S2 and engine ground >> Repair open circuit or short to power in harness or connectors. Continuity should exist. PBIB0018E |