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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: 278 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.
P0032-12:HO2S Heater Control circuit high: Lambda probe upstream heater command signal high
Overview:
DTC Description (User Friendly)
HO2S Heater Control circuit high: Lambda probe upstream
heater command signal high
ECU Pin Number
llCustomer Symptom
MIL ON, CEL OFF
Fault Effects (On Vehicle)
-
Lamp Status (If Any)
MIL ON. MIL Turns Off as and when fault condition is not
present / healed.
Fault Detection Condition (Root cause)
If pin no A046 of ems is short circuit to battery positive.
Normal Operating Condition
Proper wire harness connection between EMS ECU and
lambda sensor.
Probable Trouble Area
Wiring harness connections between lambda sensor and
EMS ECU.
Healing Condition
Rectify the error Clear through diagnostic tool.
Ignition OFF & ON
Component Details:
The O2 sensor is mounted in the exhaust manifold to monitor how much unburned oxygen is in the exhaust as the
exhaust exits the engine. Monitoring oxygen levels in the exhaust is a way of gauging the fuel mixture. It monitors fuel
mixture is burning rich (less oxygen) or lean (more oxygen).
Preliminary Checks:
1. Check whether the customer voice / view about the issue is matching with the fault effects mentioned in above
Table. If yes, go ahead with next steps. If not, check for other DTC’s presence.
2. Check whether other customers report similar complaints earlier. If yes, perform the preliminary checks with
respect to earlier issue closure.
3. Check for Damage in EMS ECU connector / Lambda sensor.
4. Check for any back out of pins at EMS ECU connector / Lambda sensor.
5. Check for any damage of pins at EMS ECU connector / Lambda sensor.