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EC-210 < COMPONENT DIAGNOSIS > [VQ35HR] P0138, P0158 HO2S2 YES >> GO TO 6. NO >> Repair or replace harness or connectors. 6. CHECK HEATED OXYGEN SENSOR 2 EC-211, "Component Inspection" . Is the inspection result normal? YES >> GO TO 8. NO >> GO TO 7. 7. REPLACE HEATED OXYGEN SENSOR 2 Replace malfunctioning heated oxygen sensor 2. CAUTION: • Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one. • Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant >> INSPECTION END 8. CHECK INTERMITTENT INCIDENT GI-38, "Intermittent Incident" >> INSPECTION END 9. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection M95. Refer to Ground Inspection in Is the inspection result normal? YES >> GO TO 10. NO >> Repair or replace ground connection. 10. CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE 1. Clear the mixture ratio self-learning value. Refer to EC-20, "MIXTURE RATIO SELF-LEARNING VALUE CLEAR : Special Repair Requirement" . 2. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0172 or P0175 detected? Is it difficult to start engine? YES >> Perform trouble diagnosis for DTC P0172, P0175. Refer to NO >> GO TO 11. 11. CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect heated oxygen sensor 2 harness connector. 3. Disconnect ECM harness connector. 4. Check the continuity between HO2S2 harness connector and ECM harness connector. 5. Also check harness for short to ground and short to power. Is the inspection result normal? YES >> GO TO 12. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 12. CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT DTC HO2S2 ECM Continuity Bank Connector Terminal Connector Terminal P0138 1 F54 1 F102 84 Existed P0158 2 F53 1 |