274 / 5157
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: 270 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.
P0136-13: O2 Sensor Circuit(Bank 1 Sensor2) Signal Error – Circuit Open
Overview:
ISO Code
P0136 – 13
Customer Symptom
Drivability will get affected during idle and part Load conditions
Fault Effects (On Vehicle)
1. No effect on engine starting.
2. Drivability may be affected, Lambda control will be deactivated.
Lamp Status (If Any)
MIL ON after 3 drive cycles
Fault Detection Condition
This fault gets logged if EMS ECU finds the downstream oxygen Sensor
signal pin is Open Circuited.
Normal Operating Condition
Downstream oxygen Sensor heater resistance is in between the maximum
and minimum threshold set for this parameter.
Probable Trouble Area
Wiring Harness Connections / Sensor
Healing Condition
Engine running and 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:
Lambda Sensor:
The oxygen Sensor operates on the principle of galvanic oxygen concentration cell (Nernst cell)
with solid electrolyte (Nernst's principle). The ceramic sensing element is a conductor of oxygen ions from a
temperature of 350 C. A heater is integrated on the sensing element. It is placed into the exhaust manifold. The
sensing element compares the residual oxygen content in the exhaust gas with the oxygen content in the reference
atmosphere (air surrounding the sensing element). This gives an output voltage between 100mV (lean exhaust gas)
to 800mV (rich exhaust gas), depending on whether the exhaust gas is lean or rich.
Preliminary Checks:
1) Loose/ Damaged Connections between Sensor and EMS ECU.
2) Check for back out of pins at both Sensor connector and ECU connector.
3) Check for damage of pins at both Sensor connector and ECU connector.
4) Check the continuity from Sensor connector pins to the ECU pins.