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PACCAR PX-6 CM2150 (2007-09) Fault Code: 1676 PID: SPN: 3249 FMI: 2 Aftertreatment Exhaust Gas Temperature 2 – Data Erratic, Intermittent, or Incorrect.
Verify the electronic control module (ECM) calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.
Possible causes:
1)Stuck in-range aftertreatment diesel particulate filter inlet temperature sensor
2)High resistance in the aftertreatment diesel particulate filter inlet temperature sensor signal or return wires.
Possible repairs:
1)If no short is found, replace the temperature sensor that is reading higher or lower than the other sensors.
2)Replace the aftertreatment diesel particulate filter inlet temperature sensor.
3)Replace the OEM harness.
4)Replace the aftertreatment harness.
5)Replace all interconnects.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 1675 PID: SPN: 3249 FMI: 3 Aftertreatment Exhaust Gas Temperature 2 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the aftertreatment diesel particulate filter inlet temperature sensor circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 1674 PID: SPN: 3249 FMI: 4 Aftertreatment Exhaust Gas Temperature 2 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the aftertreatment diesel particulate filter inlet temperature sensor circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 1667 PID: SPN: 3241 FMI: 2 Aftertreatment Exhaust Gas Temperature 1 – Data Erratic, Intermittent, or Incorrect. The aftertreatment diesel oxidation catalyst inlet temperature sensor is not changing with engine operating conditions.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 1666 PID: SPN: 3241 FMI: 3 Aftertreatment Exhaust Gas Temperature 1 Circuit – Voltage Above Normal or Shorted to High Source. High signal voltage detected at the catalyst inlet temperature sensor circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 1665 PID: SPN: 3241 FMI: 4 Aftertreatment Exhaust Gas Temperature 1 Circuit – Voltage Below Normal or Shorted to Low Source. Low signal voltage detected at the catalyst inlet sensor circuit.
PACCAR PX-6 CM2150 (2007-09) Fault Code: 1664 PID: SPN: 3050 FMI: 11 Catalyst Missing – Condition Exists. The aftertreatment catalyst in the exhaust system is not present.