Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 815 of 834 Copyright by TATA MOTORS Ltd. This document must not be used in any w ay, such as copying and redistributing to third parties, w ithout our consent P0134-00: O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1 Overview: Code Cause Effect on Vehicle Fault Code: P0134-00 1. O2 sensor 1 open circuit / time out detected 2. ECU connector pin backout 3. ECU terminal pin damage or bend 1. CE Lamp ON Lamp status: Check Engine Lamp on Malfunction Indicator Lamp off Checkpoint: Check battery voltage (nominal 11.5V ~ 14V) Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check whether the O2 sensor 1 connector is connected properly. - Step 2 Check whether the ECU connector is connected properly - Step 3 Check the continuity between O2 sensor 1 pins 1,2,3,4 and ECU pins B3 or B5 or B6, B74, B26, B10respectively. Check whether the supply voltage is 12 V at lambda sensor pin no. 1 - Step 4 Check the ECU terminal pin for any damage or bend. Check the ECU connector for any pin backout - Step 5 Check for O2 sensor functionality. Check whether it is reading values O2 sensor functions only after DPF inlet temperature sensor crosses 200 deg C/ Run the engine for few minutes before checking O2 sensor functionality Step 6 If problem persists, replace the O2 sensor 1 -
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