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06 December, 2025

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3031 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Above Normal or Shorted to High Source

Reason:Aftertreatment Diesel Exhaust Fluid Tank Temperature Sensor – Voltage Above Normal or Shorted to High Source. High signal voltage or...

06 December, 2025

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:11 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists

Reason:Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists. The aftertreatment diesel exhaust fluid dosing unit is unable...

06 December, 2025

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1678 PID: SPN:3362 FMI:31 Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists

Reason:Aftertreatment Diesel Exhaust Fluid Dosing Unit Input Lines – Condition Exists. The aftertreatment diesel exhaust fluid dosing unit is unable...

06 December, 2025

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1683 PID: SPN:3363 FMI:3 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source

Reason:Aftertreatment Diesel Exhaust Fluid Tank Heater – Voltage Above Normal or Shorted to High Source. High signal voltage detected at...

06 December, 2025

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1684 PID: SPN:3363 FMI:4 Aftertreatment 1 Diesel Exhaust Fluid Tank Heater – Voltage Below Normal or Shorted to Low Source

Reason:Aftertreatment Diesel Exhaust Fluid Tank Heater – Voltage Below Normal, or Shorted to Low Source. Low signal voltage detected at...

06 December, 2025

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PACCAR PX-9 CM2350 (2013-17) Fault Code:1691 PID:1691 SPN:5298 FMI:18 Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level

Reason:Aftertreatment Diesel Oxidation Catalyst Conversion Efficiency – Data Valid But Below Normal Operating Range – Moderately Severe Level. The temperature...

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