Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 282 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 any oil deposits in the LNT inlet. If present, clean it with compressed air (Not more than 2 bar). To identify the root cause of the oil entry - Check the turbo charger for axial play < 1mm, check for any damage in compressor blades, check for oil deposits in intercooler out pipe. If oil deposits are observed, clean the intake air path. Run the vehicle for few minutes and check again the DOC inlet and intercooler out pipe. If oil deposits are seen again, replace the turbo charger. - Step 6 Clean the soot in lambda sensors, if soot is excessively present. - Step 7 Check for any damages to the After-treatment system (LNT+DPF) - Step 8 Perform one or two DeSOx using service tool - Step 9 If problem persists, replace after treatment system - Verification condition: Drive the vehicle in city and highway condition in engine warm condition for 30 – 40 mins. Component Details: A good working LNT adsorbs more NOx so that more reductants are required to purge & also it stores more Oxygen. Whereas an inert LNT or a failed LNT there will be very less amount of NOx stored so that once the Regeneration is triggered, the Lambda sensors Cross over will happen immediately. Also, there won’t be any significant Oxygen storage. Circuit Schematic Diagram: NA Component Location and Image:
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