Reference meaning
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.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
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.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
P1C56NOx Sensor Intermittent - Bank 1 Sensor 2 is set active or stored.This condition may be caused by insufficient heat retention in the exhaust at or near the DEF doser
Manufacturer communications
1Original wording in English
DODGE
MIL Illumination Due To P1C56 - NOx Sensor Intermittent - Bank 1 Sensor 2 This bulletin involves verifying excessive Diesel Exhaust Fluid (DEF) deposits in the decomposition tube collected and if present, replacing the Catalytic Converter Shield with a ?clam shell? shield with a metal exterior.This repair is to be performed in a…
Check vehicle applicability
3A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Dodge | RAM 3500 ↗ | 2011 |
| Dodge | RAM 4500 ↗ | 2011 |
| Dodge | RAM 5500 ↗ | 2011 |
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.