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EC-154 < COMPONENT DIAGNOSIS > [HR16DE (WITH EURO-OBD)] P0133 HO2S1 Diagnosis Procedure INFOID:0000000001670922 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E15. Refer to Ground Inspection in . Is the inspection result normal? YES >> GO TO 2 NO >> Repair or replace ground connection. 2. RETIGHTEN HEATED OXYGEN SENSOR 1 Loosen and retighten the heated oxygen sensor 1. Refer to EM-159, "Removal and Installation" . >> GO TO 3. 3. CHECK EXHAUST GAS LEAK 1. Start engine and run it at idle. 2. Listen for an exhaust gas leak before three way catalyst (manifold). Is exhaust gas leak detected? YES >> Repair or replace. NO >> GO TO 4. 4. CHECK FOR INTAKE AIR LEAK Listen for an intake air leak after the mass air flow sensor. Is intake air leak detected? YES >> Repair or replace. NO >> GO TO 5. 5. CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE 1. Clear the mixture ratio self-learning value. Refer to EC-29, "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 P0171 or P172 detected? Is it difficult to start engine? YES >> Perform trouble diagnosis for DTC P0171 or P0172. Refer to NO >> GO TO 6. 6. CHECK HEATED OXYGEN SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect heated oxygen sensor 1 harness connector. 3. Disconnect ECM harness connector. 4. Check the continuity between HO2S1 harness connector and ECM harness connector. SEC502D HO2S1 ECM Continuity Connector Terminal Connector Terminal F12 1 F11 56 Existed |