P204B – Reductant Pressure Sensor Circuit Range/Performance

P204B Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P204B Possible Causes

Faulty Reductant Pressure Sensor,Reductant Pressure Sensor harness is open or shorted,Reductant Pressure Sensor circuit poor electrical connection

P204B Description

The reductant pressure sensor provides feedback to Powertrain Control Module (PCM), which regulates system pressure by controlling pump speed using pulse width modulation. The reductant pressure sensor is integral to reductant pump assembly.