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The P1C55 code on a Dodge Ram indicates an intermittent issue with the NOx sensor on bank 1 sensor 1. This sensor is a crucial part of the NOx reduction system found in diesel vehicles equipped with urea-based SCR technology. Positioned before the SCR catalyst, the sensor measures the concentration of NOx gases emitted by the engine to help regulate the injection of urea for optimal performance. A malfunctioning NOx sensor can trigger various dashboard alerts and potentially force the vehicle into a restricted operating mode. This sensor is closely integrated with the SCR system, so problems may lead to additional emission and system errors.
The code P1C55 on a Dodge Ram indicates an intermittent issue with the NOX Sensor on Bank 1, Sensor 1.