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Diagnostic Procedure NHEC0129 1 CHECK HO2S1 (FRONT) POWER SUPPLY CIRCUIT 1. Turn ignition switch “OFF”. SEC020C 3. Disconnect corresponding heated oxygen sensor 1 (front) harness connector. SEF902XA 4. Turn ignition switch “ON”. SEF311X OK or NG OK © GO TO 3. NG © GO TO 2. 2 DETECT MALFUNCTIONING PART Check the following. I Harness connectors M46, F44 I Fuse block (J/B) connector M19 I 15A fuse I Harness for open or short between heated oxygen sensor 1 (front) and fuse © Repair harness or connectors. GI MA EM LC FE AT AX SU BR ST RS BT HA SC EL IDX DTC P0135 (BANK 1), P0155 (BANK 2) HO2S1 HEATER (FRONT) Diagnostic Procedure EC-243 |