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Q501 4 Cylinder MT Application
DTC Troubleshooting Data
Version: 0.1
Date: 21-Sep-2018
Prepared By: Mithi Prasad, Sarang Kulkarni, Manish Gupta
Checked By: Yogesh Jadhav
Approved By: Satish Kumar P
Page: 143 of 1052
Copyright ©
TATA MOTORS Ltd.
This document must not be used in any way, such as copying and redistributing to third parties, without the consent of author.
P2002-97: Diesel Particulate Filter flow resistance monitoring too high (level 2, component or system operation
obstructed or blocked)
Overview:
DTC Description as per ISO standard
Diesel Particulate Filter flow resistance monitoring high -
component or system operation obstructed or blocked
ECU Pin Number
K15, K16, K42
Customer Symptom
MIL ON.
Fault Effects (On Vehicle)
Torque limitation.
Regeneration off due to driver intervention
Lamp Status (If Any)
MIL ON
Fault Detection Condition (Root cause)
Ignition ON engine ON
Normal Operating Condition
Fault condition no more present.
Probable Trouble Area
Damaged exhaust system
Leak in exhaust system
Exhaust tubes to differential pressure sensor leak.
Differential pressure sensor failure.
Healing Condition
Rectify the error
Clear through diagnostic tool
Ignition OFF & ON
Component Details:
The Differential Pressure Sensor for DPF function is to measure the pressure drop across the Diesel Particulate Filter
system and send to ECU an output signal of the differential pressure drop.
The sensor shall be mounted on engine or chassis, and receives its pressure input from two direct ports attached to the
pressure sources across the DPF. In order to operate in severe air pressure conditions (presence of soot or condensate
contamination), sensor element must have an high degree of robustness against chemical corrosion.
Preliminary Checks:
1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned above. If
Yes, go ahead with next steps. If not, check for other DTC’s presence.
2. Check whether similar complaints are earlier reported. If yes, perform the preliminary checks with respect to
Earlier issue closure.
3. Check whether the EMS is receiving Battery supply and Ground.
4. Check whether the Battery is healthy.
5. Check air and fuel system.
6. DPF filter clogged.
7. Exhaust differential pressure sensor connection.
8. DPF sensor connection.