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2 CLEAR THE SELF-LEARNING DATA. With CONSULT-II 1. Start engine and warm it up to normal operating temperature. SEF215Z 4. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0171 detected? Is it difficult to start engine? Without CONSULT-II 1. Start engine and warm it up to normal operating temperature. SEF840X 4. Stop engine and reconnect mass air flow sensor harness connector. 7. Make sure DTC P0000 is displayed. Is the 1st trip DTC P0171 detected? Is it difficult to start engine? Yes or No Yes © Perform trouble diagnosis for DTC P0171. Refer to EC-272. No © GO TO 3. 3 CHECK HEATED OXYGEN SENSOR 1 HEATER (FRONT) Refer to “Component Inspection”, EC-236. OK or NG OK © GO TO 4. NG © Replace heated oxygen sensor 1 (front). GI MA EM LC FE CL MT AT AX SU BR ST RS BT HA SC EL IDX DTC P0131 HEATED OXYGEN SENSOR 1 (FRONT) (LEAN SHIFT MONITORING) Diagnostic Procedure (Cont’d) EC-207 |