DIAGNOSTIC MANUAL MAN-00201
QUANTO
EMS
SEP 2012/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The methods may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present document,
are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the trained personnel, at the Authorized Service Centre of Mahindra & Mahindra Ltd.,
will amount to unauthorized use and shall be liable for penalty/prosecution
© 2012 Mahindra & Mahindra Ltd.
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P0191
RAIL PRESSURE OFFSET VALUE ABOVE MAXIMUM LIMIT
RAIL PRESSURE SENSOR
The rail pressure sensor is mounted on the common rail and is used to measure the rail pressure. The EMS
ECU determines the optimum fuel injection quantity at specific engine condition based on rail pressure
sensor
DTC INFORMATION
PROBABLE CAUSES OF FAILURE
NORMAL OPERATION
During after run the EMS ECU monitors the raw value of the
rail pressure and is within the limits
.
DTC DETECTING CONDITIONS
Ignition ON
EMS ECU supply voltage 8-16V
The raw value of the rail pressure sensor is above the
maximum set point during after run
DTC REACTIONS
Engine check lamp continuously ON
Torque limitations in next ignition cycle
HEALING CONDITION
Ignition Off/On
Kinked /Blocked return line
Faulty rail pressure sensor
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