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Nexon Gasoline – EMS ECU Bosch
DTC Troubleshooting Manual
Version: 0.1
Date: 26-08-2017
Prepared By: Sunu S Babu/Yogesh Jadhav
Checked By: Yeshwant Jadhav
Approved By: Satish Kumar
Document Part No: 2921 02 224 A1736
Page: 1018 of 1203
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.
P2188-92: System Too Rich at Idle – performance or incorrect operation
Overview:
ISO Code
P2188-92
Customer Symptom
1. Affect idle stability.
2. Affect performance in Low engine speed and load zones.
Fault Effects (On Vehicle)
1. Affect idle stability.
2. Affect performance in Low engine speed and load zones.
Lamp Status (If Any)
MIL ON after 3 drive cycles
Fault Detection Condition
This fault gets logged if the fuel content in the Air fuel mixture is higher than
required or air content is lower than required.
Normal Operating Condition
Air Fuel Mixture will be appropriate to the Torque and Emissions requirement.
Probable Trouble Area
Fuel Regulator/ Inlet metering valve stuck Open, Injectors, Throttle valve stuck
Closed
Healing Condition
Engine running and after 3 drive cycles
Fault permanent deletion
1. Clear DTC Command form Scan tool
2. Stack Over Flow
3. 40 warm up cycles.
4. ECU Flashing.
5. ECU Power-Fail
Component Details:
NA
Preliminary Checks:
1. Excessive fuel supply
2. Bad Fuel Regulator / Inlet metering valve.
3. Throttle valve stuck Closed
4. Injector delay time incorrect