Cumminz

Cummins ISB CM850 (2003-06) Fault Code: 293 PID: 441 SPN: 441 FMI: 3 Auxiliary Temperature Sensor Input 1 – Voltage Above Normal, or Shorted to High Source. High signal voltage or open circuit detected at the OEM auxiliary temperature circuit. Possible causes: 1)Open return circuit in the harness, connectors, or sensor2)Open signal circuit or shorted to a voltage source. Possible repairs: 1)Replace the OEM temperature sensor.2)Repair or replace the OEM harness.3)Replace the ECM.

Cummins ISB CM850 (2003-06) Fault Code: 294 PID: 441 SPN: 441 FMI: 4 Auxiliary Temperature Sensor Input 1 Circuit – Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at OEM auxiliary temperature circuit. Possible causes: 1)Signal shorted to ground in the harness.2)Signal shorted to return or ground in the sensor. Possible repairs: 1)Replace the OEM temperature sensor.2)Repair or replace the OEM harness.3)Replace the ECM.

Cummins ISB CM850 (2003-06) Fault Code: 295 PID: 108 SPN: 108 FMI: 2 Barometric Pressure ?Data Erratic, Intermittent, or Incorrect. The barometric air pressure sensor is reading an erratic value at initial key-on. The engine barometric pressure reading is compared to the other pressure sensor values at initial key-on. If the value of engine barometric pressure does not match the readings from pressure sensors within a pre-defined tolerance, this fault code is logged. To make the diagnostic run, turn the keyswitch on for 15 seconds before cranking the engine. Possible causes: 1)Stuck in-range barometric pressure sensor reading2)High resistance in the...

Cummins ISB CM850 (2003-06) Fault Code: 296 PID: 223 SPN: 1388 FMI: 14 Auxiliary Pressure Sensor Input 1 – Special Instructions This fault code is activated when the pressure input from the OEM sensor exceeds the engine protection limit defined by the OEM. An engine power derate is possible depending on the OEM application. Possible repairs: 1)The engine protection limit has been exceeded for the OEM supplied pressure input.

Cummins ISB CM850 (2003-06) Fault Code: 2961 PID: 412 SPN: 412 FMI: 15 Exhaust Gas Recirculation (EGR) temperature – Data Valid but Above Normal Operating Range, Least Severe Level. Possible causes: 1)A fouled EGR cooler2)High coolant temperature3)Low coolant level4)Malfunctioning EGR valve5)Malfunctioning EGR valve position sensor6)High exhaust temperatures7)Coolant-and-water mix8)Stuck closed variable geometry turbocharger. NOTE: This fault code will probably not be active with no load on the engine in the shop. The engine must be loaded to trip this fault code and determine if the malfunction has been found and fixed. Possible repairs: 1)Repair or replace the leaking component.2)Drain and refill...