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Hello, 08 Freightliner M2 code 128 on dash and fault aftertreatment…

Hello, 08 Freightliner M2 code...
Hello, 08 Freightliner M2 code 128 on dash and fault aftertreatment 1 particulate trap differential pressure code pulled with prolink iq can you help? Thanks Chris
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Answered in 20 minutes by:
4/28/2014
Technician: cumminsdr, Mechanic replied 8 years ago
cumminsdr
cumminsdr, Mechanic
Category: Medium and Heavy Trucks
Satisfied Customers: 4,476
Experience: All types of Cummins applications
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Hello and welcome to Just Answer! I would be more than happy to assist you today.what is the engine serial number, and what are the other numbers for the code? 128 only means engine what is the fmi pid/Sid this helps narrow it down.
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Customer reply replied 8 years ago

CUMMINS 46777352 220 hp On the scanner is reads, Fault: Aftertreatment 1 particulate trap differential pressure. FMI description: Date valid but above normal operating range - moderately severe level. SPN: 3251 FMI: 16 Does that help? 128 is on the dash that is all that appears. The check engine light is on and the DEF light is on. It is in reduced power. - Chris

Technician: cumminsdr, Mechanic replied 8 years ago

Yes Thank you

Conditions for Clearing the Fault Code

The ECM will turn off the amber CHECK ENGINE light immediately after the soot load in the aftertreatment diesel particulate filter has dropped below the moderately severe level.

 

Shop Talk

Verify the electronic control module (ECM) calibration is correct.for applicable fixes to the calibration stored in the ECM. If necessary, calibrate the ECM.

 

This fault code indicates that the aftertreatment diesel particulate filter requires maintenance by performing a stationary regeneration procedure. If this cannot be achieved VIA the dash Cummins Insite program is required to perform the Regeneration.

Possible causes of this fault code include:

  • The engine has been operating in a light load condition that prevents exhaust temperatures from being high enough to actively regenerate the aftertreatment diesel particulate filter.
  • Possible engine failure that causes excessive black soot to be generated. .
  • The aftertreatment diesel particulate filter can accumulate an excessive amount of ash in a short time period, due to excessive oil consumption or due to non-combustible elements such as, but not limited to, iron, potassium, or calcium contained in the fuel supply or additives.

 

CODEREASONEFFECT
Fault Code: 1921
PID: S324
SPN: 3251
FMI: 0/16
LAMP: Amber
SRT:

Aftertreatment Diesel Particulate Filter Differential Pressure - Data Valid But Above Normal Operating Range - Moderately Severe Level. The soot load of the aftertreatment diesel particulate filter has exceeded the recommended limits.

 

The check engine light will illuminate. The aftertreatment diesel particulate filter lamp will flash. Engine protection derate.

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Customer reply replied 8 years ago

I have tried to regen but it stays the same. Tried to clear codes but come right back. There is no heavy smoke, when I look into the back of the system it looks very clean. Is it possible the differential pressure sensor is faulty? What is Cummins Insite program? Thanks

Technician: cumminsdr, Mechanic replied 8 years ago
It is rare that the sensor is bad without other faults present, Cummins Insite is the diagnostics program that Cummins uses to access and perform tests in the ecm
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Customer reply replied 8 years ago

ECU 128 is displayed on dash and I have one other fault recorded it says; Power supply Data erratic intermittent or incorrect.

Technician: cumminsdr, Mechanic replied 8 years ago
That is for low battery voltage
cumminsdr
cumminsdr, Mechanic
Category: Medium and Heavy Trucks
Satisfied Customers: 4,476
Experience: All types of Cummins applications
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