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.
P20EENOx Catalyst Efficiency Below Threshold, SettingManufacturer communications
2Original wording in English
RAM
Reported code forms P20EE
Malfunction Indicator Lamp (MIL) Illuminated. Diagnostic Trouble Codes (DTCs) P22A1 – NOx Sensor Circuit High, Bank 1 Sensor 2, and P20EE – NOx Catalyst Efficiency Below Threshold, Setting.
RAM
Reported code forms P20EE
Malfunction Indicator Lamp (MIL) Illumination. Diagnostic Trouble Codes (DTCs) U37B8-No Description Available, And P20EE-SCR NOx Catalyst Efficiency Below Threshold, Set.
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 |
|---|---|---|
| Ram | PROMASTER | 2016 |
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.