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Home >> Lexus >> 2004 >> SC 430 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> SFI System - Diagnosis >> DTC P0134: Heated Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1), DTC P0154 Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1) >> Circuit Description
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Circuit Description

Refer to DTC P0130 on DTC P0130 OXYGEN SENSOR CIRCUIT (BANK 1 SENSOR 1), DTC P0150 OXYGEN SENSOR CIRCUIT MALFUNCTION (BANK 2 SENSOR 1), DTC P2195 OXYGEN SENSOR SIGNAL STUCK LEAN (BANK 1 SENSOR 1), DTC P2196 OXYGEN SENSOR SIGNAL STUCK RICH (BANK 1 SENSOR 1), DTC P2197 OXYGEN SENSOR SIGNAL STUCK LEAN (BANK 2 SENSOR 1), DTC P2198 OXYGEN SENSOR SIGNAL STUCK RICH (BANK 2 SENSOR 1)  .

Fig 1: DTC Detection Condition/Possible Cause Chart
G01447578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

After confirming DTC P0134, P0154, use the hand-held tester to confirm the output voltage of the HO2S (bank 1 sensor 1 and bank 2 sensor 1). If the voltage output of the HO2S is less than 0.1 V, the HO2S circuit may be open or short.