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Home >> Ford >> 2022 >> Transit Connect Titanium, Gas/Ethanol >> Repair and Diagnosis >> External Pages >> Different car >> Section 12 (Engine Controls - Powertrain DTC Charts & Descriptions (Diesel)) >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> DTC P21DD (Pcm) - REDUCTANT Heater A Current Too Low

DTC P21DD (Pcm) - REDUCTANT Heater A Current Too Low

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P21DD (PCM) - REDUCTANT HEATER A CURRENT TOO LOW

Description:  This DTC sets when the glow plug control module (GPCM) detects insufficient current draw from the reductant tank heater.
Possible Causes: 
  • RDHTRC1 circuit open
  • Damaged reductant tank heater
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 cluster message center.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST RH .
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