Cummins ISC CM2150 (2007-09) Fault Code: 1972 PID: SPN: 3245 FMI: 0 Exhaust Gas Temperature 3 – Data Valid but Above Normal Operational Range – Moderately Severe Level. The aftertreatment diesel particulate filter outlet temperature sensor reading has exceeded the maximum temperature limit.
This fault code is logged when the ECM has detected a high temperature condition in the aftertreatment system and active regeneration of the aftertreatment diesel particulate filter is occurring. The fault code indicates that a secondary fuel source is entering the aftertreatment system and is creating a temperature increase across the aftertreatment diesel particulate filter.
Possible causes:
1)Excessive engine oil or diesel fuel being introduced into the exhaust system from the engine
2)A damaged engine fuel injector causing unburned diesel fuel to enter the exhaust system
3)The aftertreatment diesel particulate filter outlet temperature sensor malfunctioned in-range
4)A face plugged aftertreatment diesel oxidation catalyst
5)An in-range engine sensor malfunction has occurred, causing excessive fuel to enter the exhaust system.
The aftertreatment system must be inspected after making the appropriate repair outlined in this fault code troubleshooting tree. Progressive damage to the aftertreatment system may have occurred. Remove the exhaust aftertreatment system from the vehicle to inspect it for potential damaged and reuse. For ISB CM2150 engines, use the following procedure in the ISB CM2150 Service Manual, Bulletin 4021578. For ISC and ISL CM2150 engines, use the following procedure in the ISC and ISL CM2150 Service Manual, Bulletin 4021569.
Possible repairs:
1)If no short is found, replace the temperature sensor that is reading higher or lower than the other sensors.
2)Remove the diesel oxidation catalyst from the vehicle and clean the face.
3)Replace the injector, if necessary.
4)Repair or replace any components that caused the engine oil or diesel fuel contamination.
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