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EC-158 < COMPONENT DIAGNOSIS > [VQ40DE] P0133, P0153 A/F SENSOR 1 2. Loosen and retighten three ground screws on the body. Refer to OK or NG OK >> GO TO 2. NG >> Repair or replace ground connections. 2. RETIGHTEN AIR FUEL RATIO (A/F) SENSOR 1 Loosen and retighten A/F sensor 1. EM-31, "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). OK or NG OK >> GO TO 4. NG >> Repair or replace. 4. CHECK FOR INTAKE AIR LEAK Listen for an intake air leak after the mass air flow sensor. OK >> GO TO 5. NG >> Repair or replace. 5. CLEAR THE SELF-LEARNING DATA With CONSULT-III 1. Start engine and warm it up to normal operating temperature. 2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-III. 3. Clear the self-learning control coefficient by touching “CLEAR” or “START”. 4. Run engine for at least 10 minutes at idle speed. Without CONSULT-III 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch OFF. BBIA0539E PBIB1216E 2009 Pathfinder |