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 communications
8Original wording in English
VOLVO
Reported code forms P221A
Selective Catalytic Reduction ( SCR ) Efficiency And NOx Sensor Diagnostic Trouble Codes ( DTC ) P225C, P225E, P221A and P2201: NOx Sensor Diagnostic Information TO BE USED BEFORE SENSOR REPLACEMENT - OBD13 And Newer…
VOLVO
Reported code forms P221A
Selective Catalytic Reduction ( SCR ) Efficiency And NOx Sensor Diagnostic Trouble Codes ( DTC ) P225C, P225E, P221A and P2201: NOx Sensor Diagnostic Information TO BE USED BEFORE SENSOR REPLACEMENT - OBD13 And Newer…
MACK
Reported code forms P221A
Selective Catalytic Reduction ( SCR ) Efficiency And NOx Sensor Diagnostic Trouble Codes ( DTC ) P225C, P225E, P221A and P2201: NOx Sensor Diagnostic Information TO BE USED BEFORE SENSOR REPLACEMENT - OBD13 And Newer…
VOLVO
Reported code forms P221A
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 P221A
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…
VOLVO
Reported code forms P221A
Selective Catalytic Reduction ( SCR ) Efficiency And NOx Sensor Codes P225C, P225E, P221A, P2201, P103C, P20EE, And P207F : NOx Sensor Diagnostic Information TO BE USED BEFORE SENSOR REPLACEMENT - OBD13 And Newer…
Check vehicle applicability
47A 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 |
| Nissan | TITAN XD | 2016 |
| Volvo | VAH | 2018 |
| Volvo | VAH | 2017 |
| Volvo | VAH | 2016 |
| Volvo | VAH | 2015 |
| Volvo | VAH | 2014 |
| Volvo | VAH | Year not specified |
| Volvo | VHD | 2019 |
| Volvo | VHD | 2018 |
| Volvo | VHD | 2017 |
| Volvo | VHD | 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.