P204A Code

There are possible reason of the car engine P204A Code and those possible causes are Faulty Reductant Pressure Sensor, Reductant Pressure Sensor harness is open or shorted and Reductant Pressure Sensor circuit poor electrical connection. The car engine code has description and those are the reductant pressure sensor delivers feedback to Powertrain Control Module (PCM), which controls system pressure by regulatory pump speed using pulse width modulation. The reductant compression sensor is integral to reductant pump assembly. Once the car engine is ok, you may drive the car but before taking the car, you should take the car for a test drive.