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DTC P21AF - REDUCTANT Level Sensor C Circuit Low

P21AF - REDUCTANT LEVEL SENSOR C CIRCUIT LOW

Description:  This DTC sets when the reductant level sensor voltage is greater than or less than a calibrated limit for a calibrated amount of time.
Possible Causes: 
  • RDL3 circuit short to ground
  • SIGRTN circuit short to ground
  • Damaged reductant level sensor
Diagnostic Aids:  The presence of this DTC may indicate the vehicle is operating in derate mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument panel cluster (IPC) message center.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST RJ .