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Home >> Ford >> 2021 >> Expedition XL, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Memory Modules >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> P21D1 - Cylinder 3 Injector B Circuit/Open

P21D1 - Cylinder 3 Injector B Circuit/Open

DTC DESCRIPTION P21D1 - CYLINDER 3 INJECTOR B CIRCUIT/OPEN

Description:  The comprehensive component monitor (CCM) monitors the operation of the fuel injector drivers in the PCM. This DTC sets when the fuel injector circuitry is inoperative.
Possible Causes: 
  • VPWR circuit open
  • INJ3 circuit open
  • Damaged fuel injector 3
Diagnostic Aids:  The INJ3_F PID flags equals YES.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to Pinpoint Test KG.