X104 CNG (Nexon) 4” Instrument Cluster DTC Troubleshooting Data Version: 2.0 Date: 19-August-24 Author: Suraj Shivsharan Page: 138 of 160 Copyright © TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author. U0401-81:- Invalid Data Received From ECM Overview:- ISO Code U0401-81 Customer Symptom First & last bar of CNG fuel gauge shall blink @ 1Hz, AFE,IFE screen display will be --.--, Current gear display will display as ‘F’. Fault Effects (On Vehicle) First & last bar of CNG fuel gauge shall blink @ 1Hz, AFE,IFE screen display will be --.--, Current gear display will be ‘F’. Lamp Status (If Any) NA Fault Detection Condition Relevant functional DTCs present in ECM Normal Operating Condition ECM ECU sends correct data in normal condition. Probable Trouble Area Incorrect data received from ECM. Healing Condition After rectifying relevant functional failures in the ECM ECU Trouble Shooting:-
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