P204A GMC - Reductant Pressure Sensor Circuit
- Faulty Reductant Pressure Sensor
- Reductant Pressure Sensor harness is open or shorted
- Reductant Pressure Sensor circuit poor electrical connection
- Engine Light ON (or Service Engine Soon Warning Light)
P204a Gmc DescriptionThe 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.
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