[easymon]

Well knew it was going to happen. Warmed her up and p244a service exhaust. Dealer run scan and found bank 1 sensor not reading pressure. Part ordered for install Wednesday.

 

[DodgeMech]

they didn't do the flash first? most engine lights on these things are solved with a flash...rarely a part that actually goes bad

 

[easymon]

They checked for flash was none there were several things to check they looked good. Replaced sensor now has a positive reading instead of negative. This is what we wanted will see if this worked . Thanks for checking in.

 

[Too Tall]

Doesn't sound like a big deal. Here's more info than you probably want on it:

P244A-DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE TOO LOW

For a complete wiring diagram, refer to the Wiring Information.


Theory of Operation



This diagnostic checks to make sure that the Diesel Particulate Filter is present and functioning correctly. The Powertrain Control Module (PCM) uses the Exhaust Differential Pressure Sensor to monitor the pressure differential through the Diesel Particulate Filter. The PCM will set the fault if it detects that the Diesel Particulate Filter is not present in the aftertreatment/exhaust system. This DTC is a two trip fault. Active regeneration of the Diesel Particulate Filter will be disabled. The PCM will turn off the MIL lamp immediately after the diagnostic runs and passes.


•When Monitored:
This diagnostic runs when the engine is running, but not during active regeneration of the Diesel Particulate Filter.

•Set Condition:
The Powertrain Control Module (PCM) will set the fault if it detects that the Diesel Particulate Filter is not present in the aftertreatment/exhaust system.








Possible Causes




DIESEL PARTICULATE FILTER HAS BEEN REMOVED FROM THE VEHICLE



EXHAUST DIFFERENTIAL PRESSURE SENSOR TUBES ARE REVERSED AT THE DIESEL PARTICULATE FILTER



EXHAUST SYSTEM LEAK



DIESEL PARTICULATE FILTER IS CRACKED OR BROKEN INTERNALLY



EXHAUST DIFFERENTIAL PRESSURE SENSOR FAILED IN-RANGE




Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).



1.VISUAL INSPECTION

--------------------------------------------------------------------------------






1.

Inspect that the Diesel Particulate Filter has not been tampered with or removed.



Tampering or removal of the aftertreatment system has been detected?

Yes

•Install the correct aftertreatment system for the vehicle.
•Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No

•Go To 2



2.CHECK FOR THE DIESEL PARTICULATE FILTER DIFFERENTIAL PRESSURE HOSES REVERSED

--------------------------------------------------------------------------------






1.

Start the engine.







2.

With the scan tool, monitor the soot filter delta pressure reading.







3.

The delta pressure should have a positive pressure reading. A negative reading indicates the hoses are reversed.



Is the Exhaust Differential Pressure Sensor reading a positive value?

Yes

•Go To 3

No

•Reverse the Exhaust Differential Pressure Sensor hoses.
•Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).



3.CHECK FOR AN EXHAUST SYSTEM LEAK

--------------------------------------------------------------------------------






1.

Turn the ignition off.







2.

Perform the CHECKING THE EXHAUST SYSTEM FOR LEAKS diagnostic procedure. (Refer to 29 - Non-DTC Diagnostics/Drivability - Diesel - Diagnosis and Testing) .



Were any exhaust leaks found?

Yes

•Repair the Exhaust System leak.
•Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No

•Go To 4



4.PERFORM THE AFTERTREATMENT SYSTEM INSPECTION

--------------------------------------------------------------------------------






1.

Perform the AFTERTREATMENT INSPECTION GUIDELINE - 6.7L procedure. (Refer to 29 - Non-DTC Diagnostics/Drivability - Diesel - Diagnosis and Testing) .



Does aftertreatment Diesel Particulate Filter show evidence of failure?

Yes

•Replace the Diesel Particulate Filter in accordance with the service information.
•Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).

No

•Replace the Exhaust Differential Pressure Sensor in accordance with the service information.
•Perform the DIESEL AFTERTREATMENT VALIDATION - 6.7L procedure. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).