AftertreatmentMack Diesel ECM

P20D0-00

Name: ECM Performance
Address: Fort Lauderdale, FL, 33325, US
Telephone: (888) 768-2447
Price range: $$-$$$

DPF, DEF, SCR, and NOx-reduction system faults.

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System

Mack Aftertreatment

Mack ECM Service

Diagnostic Overview

Mack fault code P20D000 usually indicates a general aftertreatment fuel dosing control fault. The ECM may be unable to command or confirm proper operation of the fuel doser used during regeneration. This can prevent the DPF from reaching the temperature needed to burn soot and may eventually lead to a derate if the DPF becomes restricted.

Likely Causes

Aftertreatment fuel doser failure; plugged doser nozzle; low fuel supply to doser; open or shorted circuit; connector corrosion; control module fault.

What To Check First

Inspect the doser, wiring, fuel supply, and connector. Run the appropriate aftertreatment fuel dosing test and confirm exhaust temperature response.

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Related Aftertreatment Fault Codes

View All Aftertreatment Codes

P046C-64

Mack fault code P046C64 generally points to an EGR differential pressure sensor range or performance problem.

P20D0

Mack fault code P20D0 is commonly associated with the aftertreatment fuel dosing or hydrocarbon dosing system used to raise exhaust temperature during DPF regeneration.

P20DC-00

Mack fault code P20DC00 is commonly related to aftertreatment fuel supply, dosing control, or dosing-circuit performance.

P21CA-00

Mack fault code P21CA00 is generally tied to reductant/DEF or aftertreatment control performance depending on the specific Mack/Volvo engine calibration.

P24F8-13

Mack fault code P24F813 is typically an aftertreatment-related rationality or calibration-style fault.

P2699-00

Mack fault code P269900 commonly relates to aftertreatment fuel dosing or hydrocarbon dosing performance.

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