Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 363 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 P0054-1A- HO2S Heater Resistance Bank 1 Sensor 2 - Low resistance Overview: Code Cause Effect on Vehicle Fault Code: P0054-1A 1. O2 sensor 2 wiring circuit failure 2. Failed oxygen sensor heater circuit wiring 3. ECU Connector pin backout 4. ECU terminal pin damage or bend 5. Failed EMS ECU 1. MIL Lamp ON 2. Disabled drive mode option 3. Reduced vehicle performance Lamp status: Check Engine Lamp off Malfunction Indicator Lamp on Check points: Check for electrical connections and battery voltage(nominal range 11.5V ~ 12.8V) Check for any battery or ECU related faults. If present, address it first. Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check whether the O2 sensor 2 connector is connected properly. - Step 2 Check whether the ECU connector is connected properly - Step 3 Check the continuity between O2 sensor 2 pins 1,2,3,4 and ECU pins B3 or B5 or B6, B57, B25, B7respectively. 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 “Before DPF temperature” crosses 200 deg C/ Run the engine for few
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