Diagnosis & Repair

See DTC P0135: HEATED OXYGEN SENSOR CIRCUIT (BANK NO. 1, SENSOR NO. 1), DTC P0141: HEATED OXYGEN SENSOR CIRCUIT (BANK NO. 1, SENSOR NO. 2), DTC P0155: HEATED OXYGEN SENSOR CIRCUIT (BANK NO. 2, SENSOR NO. 1), DTC P0161: HEATED OXYGEN SENSOR CIRCUIT (BANK NO. 2, SENSOR NO. 2) circuit test.