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.
P1C55NOx Sensor Intermittent - Bank 1 Sensor 1P1C55NOx Sensor Intermittent - Bank 1 Sensor 1 (For ammonia sensor deleted systems only)P1C55NOx Sensor Intermittent - Bank 1 Sensor 1 (For ammonia sensor deletedsystems only)P1C55NOx Sensor Intermittent - Bank 1 Sensor 1(automatic transmission only)Manufacturer communications
10Original wording in English
RAM
Reported code forms P1C55
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. There will be a choice between two calibrations. One for vehicles that utilize an ammonia…
RAM
Reported code forms P1C55
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain ControlModule (ECM/PCM) with the latest available software. Customers may experience a Malfunction…
RAM
Reported code forms P1C55
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Powertrain Control Module (PCM) with thelatest available software. Customers may experience a Malfunction Indicator Lamp (MIL)…
RAM
Reported code forms P1C55
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further…
RAM
Reported code forms P1C55
Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. Customers may experience a…
RAM
Reported code forms P1C55
Flash: 6.7L Diagnostic and System Improvements This bulletin involves reprogramming the Engine Control Module/Powertrain Control Module (ECM/PCM) with the latest available software. The following Diagnostic Trouble…
Check vehicle applicability
14A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Chrysler | CHRYSLER TRUCK | Year not specified |
| Ram | 2500 | 2015 |
| Ram | 3500 | 2017 |
| Ram | 3500 | 2016 |
| Ram | 3500 | 2015 |
| Ram | 3500 | 2014 |
| Ram | 4500 | 2017 |
| Ram | 4500 | 2016 |
| Ram | 4500 | 2015 |
| Ram | 4500 | 2014 |
| Ram | 5500 | 2017 |
| Ram | 5500 | 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.