What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P20EESCR NOx Catalyst Efficiency Below Threshold (Bank 1) - US17+OBD2019 And Newer EmissionsManufacturer communications
7Original wording in English
MACK
Reported code forms P20EE
Mack Chassis - Diagnostic Trouble Code (DTC) P20EE - SCR NOx Catalyst Efficiency Below Threshold (Bank 1) - US17+OBD2019 And Newer Emissions
MACK
Reported code forms P20EE
Mack Chassis - Diagnostic Trouble Code (DTC) P20EE - SCR NOx Catalyst Efficiency Below Threshold (Bank 1) - US17+OBD2019 And Newer Emissions
MACK
Reported code forms P20EE
Diagnostic Trouble Code (DTC) P20EE - SCR NOx Catalyst Efficiency Below Threshold (Bank 1) - US17+OBD2019 And Newer Emissions
MACK
Reported code forms P20EE
Diagnostic Trouble Codes (DTC) P20EE And P103C, Diagnostic Procedure; - US17+OBD16 and US17+OBD2018 Emissions, Model Year 2018,2019
MACK
Reported code forms P20EE
Selective Catalytic Reduction ( SCR ) Efficiency And NOx Sensor Diagnostic Trouble Codes ( DTC ) P225C, P225E, P221A, P2201, P103C, P20EE, And P207F : NOx Sensor Diagnostic Information TO BE USED BEFORE SENSOR…
MACK
Reported code forms P20EE
Selective Catalytic Reduction ( SCR ) Efficiency And Diesel Exhaust Fluid ( DEF ) Dosing Valve Diagnostic Trouble Codes ( DTC ) P208E, P103C, P0422, P20EE, P207F, P225E; Dosing Valve Diagnostic Information TO BE USED…
Check vehicle applicability
1A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mack | MACK | Year not specified |
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.