Heated Oxygen Sensor (Sensor 1) Inspection

Check that H02S-1 signal voltage referring to Step 2 and 3 of "DTC P0131 /P0132/P1131 /P1132: 02 SENSOR (BANK 1 SENSOR -1) CIRCUIT LOW VOLTAGE SHIFT / HIGH VOLTAGE SHIFT / CIRCUIT CONTINUITY / CIRCUIT HIGH VOLTAGE " and/or " DTC P0151 / P0152 / P1151 / P1152: 02 SENSOR (BANK 2 SENSOR-1) CIRCUIT LOW VOLTAGE SHIFT / HIGH VOLTAGE SHIFT / CIRCUIT CONTINUITY / CIRCUIT HIGH VOLTAGE ". If signal voltage does not vary as specified, repair or replace.