DTC P0135, DTC P0155, DTC P0141 Or DTC P0161: Notes

WARNING: This page is about a different car, the 2002 Lexus GS 430. However, it is still accessible from the selected car via links, so may be relevant.

Code Definition

DTC P0135: Heated Oxygen Sensor Heater Circuit (Bank No. 1, Sensor No. 1)
DTC P0155: Heated Oxygen Sensor Heater Circuit (Bank No. 2, Sensor No. 1)
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 connector 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.

NOTE: Bank No. 1 refers to bank which includes cylinder No. 1. Bank No. 2 refers to bank without cylinder No. 1. Heated oxygen sensor No. 1 refers to sensor closest to engine block. Heated oxygen sensor No. 2 refers to sensor furthest away from engine block.

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