Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 751 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 P2C79-00 - NOx Adsorber - Sulfur Limit Exceeded Overview: Code Cause Effect on Vehicle Fault Code: P2C79-00 1. Sulfur mass limit exceeded 2. Inconsistent LNT regeneration 1. CE Lamp ON 2. Vehicle performance reduced Lamp status: Check Engine Lamp off Malfunction Indicator Lamp off Checkpoint: Check battery voltage (nominal 11.5V ~ 14V) Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check weather injector, air path or wraf related faults present - Step 2 Check driving pattern through regeneration history parameters from tool - Step 3 Check for any damages to the After-treatment system (LNT+DPF) Step 4 Check LNT sulfur mass value, if the value is more than 3500 mg, then run DeSOX service - Step 5 After the end of the service, check if the LNT sulfur mass value is less than 2500, if so, clear the fault and verify if the fault is not getting triggered -
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