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P0133, P0153 A/F SENSOR 1 EC-1143 < DTC/CIRCUIT DIAGNOSIS > [VQ40DE FOR MEXICO] C D E F G H I J K L M A EC N P O 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-148, "Removal and Installation (Exhaust Manifold)" . >> 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 1. Start engine and warm it up to normal operating temperature. 2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT. 3. Clear the self-learning control coefficient by touching “CLEAR” or “START”. 4. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0171, P172, P0174 or P0175 detected? Is it difficult to start engine? Without CONSULT 1. Start engine and warm it up to normal operating temperature. 2. Turn ignition switch OFF. BBIA0539E PBIB1216E |