Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 370 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 Step 5 Check for O2 sensor functionality. Check whether it is reading values O2 sensor functions only after “Before DPF temperature” crosses 200 deg C/ Run the engine for few minutes before checking O2 sensor functionality Step 6 If problem persists, replace the O2 sensor 2 - Verification condition: 1. Run Vehicle few mins till T5reads more than 200 degC. Then drive in city and highway condition. Component Details: The oxygen sensors used a heated circuit to warm up the sensor for faster feedback operation. The oxygen sensor may use three or four wires depending on the vehicle, two are usually used for the sensor feedback to EMS ECU and the other wires are for the heater to power the heated circuit. Three wire sensors are usually grounded through the exhaust system, and four wire sensors have a separate ground wire. Circuit Schematic Diagram:
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