Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 372 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 P2628-00- O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1 Overview: Code Cause Effect on Vehicle Fault Code: P2628-00 1. Lambda 1 Sensor is drifted 2. Faulty O2 Sensor 1 - Upstream 3. Carbon Buildup on O2 Sensor 1 4. Excessive exhaust leakage 5. Excessive intake Air path leakage 6. Corroded or damaged connector 7. Faulty or damaged wiring 8. ECU terminal pin damage or bend 9. ECU connector pin backout 1.CE Lamp ON 2. Abnormal vehicle behavior 3. Increased fuel consumption Lamp status: Check Engine Lamp on Malfunction Indicator Lamp off Check points: Check for any AMF, EGR, Throttle, MDP, VGT, ADC related faults. If present, address it first. Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check for physical damage in O2 sensor(s)/ Connector - Step 2 Check for any damage in electrical wiring/Connector (Burnt or cut wire). - Step 3 Check the ECU terminal pin for any damage or bend. Check the ECU connector for any pin backout. If found, rectify it - Step 4 Check the continuity between O2 sensor 1 pins 1,2,3,4 and ECU pins B3 or B5 or B6, B74, B26, B10respectively. - Step 5 Check for foreign particles in the connector -
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