Cummins ISB CM850 (2003-06) Fault Code: 1717 PID: SPN: 3241 FMI: 15 Exhaust Gas Temperature 1 ? Data Valid but Above Normal Operational Range ? Least Severe Level. High catalyst inlet temperature has been detected. This fault is triggered when the temperature at the catalyst inlet exceeds the maximum allowable temperature for a given engine rating. Leaks in the charge air system or a faulty turbocharger can cause high exhaust gas temperature. On-Board Diagnostics (OBD) Information: 1)The ECM illuminates the appropriate amber or red fault lamp when the diagnostic runs and fails.2)The ECM turns OFF the appropriate fault lamp when...

Cummins ISB CM850 (2003-06) Fault Code: 1718 PID: SPN: 1322 FMI: 11 Engine Misfire for Multiple Cylinders ? Condition Exists. Engine misfire has been detected in multiple cylinder numbers. If Fault Code 1718 is inactive in the ECM memory and there is no complaint such as ?low power? or ?engine misfire?, it is possible that an intermittent event such as air entering the fuel system following a filter change caused the fault. Inactive counts of Fault Code 1718 should be disregarded unless other performance symptoms are present. The engine coolant temperature must be greater than 160?F before this diagnostic will...

Cummins ISB CM850 (2003-06) Fault Code: 1845 PID: SPN: 97 FMI: 3 Water-in-Fuel Indicator Sensor Circuit – Voltage Above Normal or Shorted to High Source (For Generator Engines Only). High voltage detected at the water-in-fuel indicator circuit. The water-in-fuel sensor is located in the Stage 1 filter housing. It is a serviceable part. Possible causes: 1)Open return or signal circuit in the harness, connectors, or sensor.2)SIGNAL wire shorted to sensor supply or battery voltage. Possible repairs: 1)Replace the damaged section of harness or damaged water-in-fuel indicator sensor.2)Replace the water-in-fuel indicator sensor.3)The removal and installation of the connector may correct the...

Cummins ISB CM850 (2003-06) Fault Code: 1846 PID: SPN: 97 FMI: 4 Water-in-Fuel Indicator Sensor Circuit – Voltage Below Normal or Shorted to Low Source (For Generator Engines Only). Low voltage detected at the water-in-fuel indicator circuit. The water-in-fuel indicator sensor is integrated into the bottom of the suction fuel filter. The first stage fuel filter is located on the intake side of the engine. Shop TalkThe water-in-fuel sensor is located in the Stage 1 filter housing. It is a serviceable part. Possible causes: 1)SIGNAL circuit shorted to ground in the harness, sensor, or connector. Possible repairs: 1)Replace the damaged...

Cummins ISB CM850 (2003-06) Fault Code: 1848 PID: 105 SPN: 105 FMI: 10 Intake Manifold 1 Temperature ? Abnormal Rate of Change. The intake manifold temperature sensor is not responding to a change in engine operating conditions. The engine intake manifold temperature is monitored during engine warm-up. If the engine intake manifold temperature reading is not changing to match the engine operating conditions, the intake manifold temperature sensor is then determined to be stuck in-range and this fault code is logged. The ECM must not see engine speed for a period of eight hours before this diagnostic will run. Possible...