Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1.0 Date: 30/11/2019 Author: ERC Page 334 of 610 Copyright by TATA MOTORS Ltd. This document must not be used in any way, such as copying and redistributing to third parties, without 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. Faulty O2 Sensor 2. Carbon Buildup on O2 Sensor 3. Blown fuse (if applicable) 4. Fuel pressure too high 5. Fuel pressure too low 6. Vacuum leak on the engine 7. Excessive exhaust leak 8. Corroded or damaged connector 9. Faulty or damaged wiring 10. Faulty ECU 1. Poor performance that progresses 2. The engine will run lean 3. The engine will run rich 4. Check Engine Light illuminated 5. Smoke from tailpipe 6. Increased fuel consumption Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check for Defective O2 sensor(s) Functionality Step 2 Check for any carbon Buildup on O2 Sensor Functionality Step 3 Check for any blown fuse (if applicable) Physical Step 4 Check for fuel pressure too high or too low Functionality Step 5 Check for any vacuum or Exhaust leak Physical Step 6 Check for corroded or damaged connector Physical Step 7 Check ECU Functionality Circuit Schematic Diagram:
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