Cummins ISX12 CM2250 (2010-12) Fault Code: 2961 PID: 412 SPN: 412 FMI: 15 Exhaust Gas recirculation Temperature- Data Valid But Above Normal Operating Range- Least Severe Level

Circuit Description
The EGR temperature sensor is a variable resistor sensor and is used to measure the temperature of the EGR gas flow after it exits the EGR cooler. The engine control module (ECM) supplies 5 volts to the EGR temperature signal circuit. The ECM monitors the change in voltage caused by changes in the resistance of the sensor to determine the EGR flow temperature.

The EGR temperature value is used by the ECM for the engine protection system and engine emissions control.

Component Location
The EGR temperature sensor is located on the EGR connection tube between the EGR valve and the air intake connection.

Conditions for Running the Diagnostics
This diagnostic runs continuously when the keyswitch is in the ON position.

Conditions for Setting the Fault Codes
The ECM detects that the EGR temperature is greater than 274?C [525?F] for more than 5 seconds.

Action Taken When the Fault Code is Active
The ECM logs the fault code immediately when the diagnostic runs and fails.
The engine torque will be derated up to 40 percent to limit the EGR temperature.
Conditions for Clearing the Fault Code
To validate the repair using a Diagnostic Road Test, utilize a route that incorporates both stop-and-go city driving and steady state highway driving. It may be necessary to load the unit for certain diagnostics in the ECM to run.
To validate the repair using a Chassis Dynamometer Test, utilize a routine that incorporates acceleration and motoring events, steady state highway operation, and load. This will simulate normal driving and allow the diagnostics in the ECM to run.
The fault code status displayed by INSITE? electronic service tool will change to INACTIVE immediately after the EGR temperature falls below 210?C [410?F] and the diagnostic runs and passes.
The ?Reset All Faults? command in INSITE? electronic service tool can be used to clear active and inactive faults.

Shop Talk
Possible causes of this fault code include:

Plugged or restricted EGR differential pressure sensor ports
Damaged EGR differential pressure tubes
A malfunctioning EGR valve
A stuck open turbocharger control valve
A low reading from the EGR differential pressure sensor
A low reading for the EGR valve position sensor
High exhaust temperatures
Low coolant level
High coolant temperature
An incorrect coolant/water mixture
A stuck closed variable geometry turbocharger
A fouled EGR cooler.
NOTE: This fault code will most likely not be active with no load in the shop. The engine must be loaded to trigger this fault code.

Possible Cause:
1) EGR temperature Sensor failure
2) EGR cooler
3) ECM calibration