Cummins ISB CM850 (2003-06) Fault Code: 1671 PID: SPN: 1761 FMI: 1 Catalyst Tank Level ? Data Valid but Below Normal Operational Range ? Moderately Severe Level. Low catalyst solution level has been detected in the catalyst solution tank.
Fault code 1671 is triggered when low catalyst solution level has been detected in the catalyst solution tank. Add catalyst solution to the tank. This fault code is only a warning for low catalyst tank solution level.
On-Board Diagnostic (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 the diagnostic runs and passes.
Possible repairs:
1)Add catalyst solution to the catalyst solution tank.
Cummins ISB CM850 (2003-06) Fault Code: 1669 PID: SPN: 1761 FMI: 3 Catalyst Tank Level Sensor Circuit ? Voltage Above Normal, or Shorted to High Source. High signal voltage detected at the catalyst tank level sensor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 1668 PID: SPN: 1761 FMI: 4 Catalyst Tank Level Sensor Circuit ? Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at the catalyst tank level sensor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 1667 PID: SPN: 3241 FMI: 2 Exhaust Gas Temperature 1 ? Data Erratic, Intermittent, or Incorrect. The exhaust gas temperature #1 sensor is not changing with engine operating conditions.
Cummins ISB CM850 (2003-06) Fault Code: 1666 PID: SPN: 3241 FMI: 3 Exhaust Gas Temperature 1 Circuit ? Voltage Above Normal, or Shorted to Low Source. High signal voltage detected at the catalyst inlet temperature sensor circuit
Cummins ISB CM850 (2003-06) Fault Code: 1665 PID: SPN: 3241 FMI: 4 Exhaust Gas Temperature 1 Circuit ? Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at the catalyst inlet temperature sensor circuit.
Cummins ISB CM850 (2003-06) Fault Code: 1664 PID: SPN: 3050 FMI: 11 Catalyst Missing ? Condition Exists. The aftertreatment catalyst in the exhaust system is not present.
