DTC P0141 & DTC P0161: Notes

Code Definition

DTC P0141: Heated Oxygen Sensor Heater Circuit (Bank No. 1, Sensor No. 2)
DTC P0161: Heated Oxygen Sensor Heater Circuit (Bank No. 2, Sensor No. 2)

CAUTION: If ECM replacement is instructed in following testing, always ensure ECM harness connectors and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. If ECM is replaced, ECM must be programmed with proper ignition key code for engine immobilizer system. For programming procedures, see COMPUTER RELEARN PROCEDURES - IMPORT article in GENERAL INFORMATION, or appropriate ENGINE IMMOBILIZER SYSTEMS article in ACCESSORIES & EQUIPMENT.

NOTE: Bank 1 is also known as right bank (RH). Heated oxygen sensor No. 1 refers to sensor closest to engine block. Heated oxygen sensor No. 2 refers to sensor farthest from engine block.

NOTE: For component location, see appropriate illustration in THEORY & OPERATION article.