Cummins ISX12 CM2250 (2010-12) Fault Code: 3136 PID: SPN: 5019 FMI: 3 Engine Exhaust Gas Recirculation Outlet Pressure Sensor Circuit- Voltage Above Normal or Shorted to High Source
Circuit Description
The electronic control module (ECM) provides a 5 volt supply to the EGR orifice pressure sensor on the sensor supply circuit. The ECM also provides a ground on the sensor return circuit. The EGR orifice pressure sensor provides a signal to the ECM on the EGR orifice pressure sensor signal circuit. This sensor signal voltage changes based on the pressure at the EGR orifice pressure sensor.
Component Location
The EGR orifice pressure sensor is mounted on the EGR mass measurement assembly near the EGR differential pressure sensor.
Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position or the engine is running.
Conditions for Setting the Fault Codes
The ECM detects that the EGR orifice pressure sensor signal voltage is greater than 4.75-volts for 5 seconds.
Action Taken When the Fault Code is Active
The ECM illuminates the amber CHECK ENGINE lamp and/or Malfunction Indicator Lamp (MIL) immediately when the diagnostic runs and fails.
The EGR valve will be closed.
Engine torque will be reduced if the engine is operated for an extended period of time with this fault active.
Conditions for Clearing the Fault Code
To validate the repair, start the engine and let it idle for 1 minute.
The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the diagnostic runs and passes.
The ECM will turn off the amber CHECK ENGINE lamp after the diagnostic runs and passes.
For On-Board Diagnostics (OBD) engines, the ECM will turn off the MIL after three consecutive trips where the diagnostic runs and passes.
The ?Reset All Faults? command in INSITE? electronic service tool can be used to clear active and inactive faults, as well as extinguish the MIL for OBD applications.
Shop Talk
Possible causes of this fault include:
Open return circuit in the harness, connectors, or sensor
Signal circuit shorted to sensor supply or battery voltage.
Possible Cause:
1) ECM failure
2) Engine Harness
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