Vehicle Platform & ECU Name DTC Troubleshooting Data Ver: 1 Date: 23/11/2022 Author: ERC Page 339 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 P0299-00: Turbocharger/Supercharger "A" Underboost Condition - Signal Below Allowable Range Overview: Code Cause Effect on Vehicle Fault Code: P0299-00 1. Boost pressure developed is very low when compared to the boost required by the engine. 2. VGT malfunctioning due to electrical short or open circuit. 3. Intake Air path leakage (Intake air hoses damage) 4. VGT is stuck open 5. Intercooler damage 6. Exhaust leakage before turbine inlet 7. Intake throttle partially stuck closed 8. Particulate filter overloaded or clogged faults 9. EGR leakage 1. CE Lamp ON 2. High white smoke in tail pipe is possible 3. Engine hunting at free acceleration is possible 4. Reduced engine performance 5. Disables engine drive mode i.e. Sport mode, Eco mode 6. Disables Speed pilot control routine service (SPCS) Lamp status: Check Engine Lamp on Malfunction Indicator Lamp off Checkpoints: Check for any other faults related to AMF, Throttle, ECU, EGR, VGT electrical, particulate filter faults. If present. Address it first. Trouble Shooting: Sr. No. Steps Specifications Step 1 Check for electrical short circuit in VGT related ECU pins – A92, A71, A4, A5, A8 - Step 2 Check for any leakage in Airpath (air hoses) or Exhaust leakage before turbo - Step 3 Check for any damage in the intercooler creating air leakage. If found damaged, replace it -
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