Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 229 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 P2147-00: Fuel Injector Group "A" Supply Voltage – Circuit Low Overview: Code Cause Effect on Vehicle Fault Code: P2147-00 1. Injector Bank 1 (Cylinder 1 or Cylinder 4) high side pins short to ground 2. Faulty ECU 1. MIL Lamp ON 2. Idle speed raised 3. Reduced vehicle performance 4. Vehicle misfire possible 5. Vehicle might not start Lamp status: Check Engine Lamp off Malfunction Indicator Lamp on Checkpoints: 1. Check wiring harness connections related to injector circuit Trouble Shooting Steps: Sr. No. Steps Specifications Step 1 Check the Battery voltage. If Voltage out of Range, correct battery Nominal range – 11.5 V ~ 12.8V Step 2 Check if injector connector is fitted properly. - Step 3 Check for pin back outs on injector and ECU connector. Rectify if necessary - Step 4 Check for wiring harness circuit continuity between Cylinder 1 injector pins 1,2 to ECU pins A23, A02 respectively. Also Cylinder 4 injector pins 1,2 to ECU pins A22, A01 respectively. If there is any missing continuity, correct it. Refer circuit diagram Step 5 Replace ECU - Verification condition: Drive the vehicle in city and highway condition.
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