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Home › Hyundai › 2021 › Ioniq Plug-In Hybrid Limited › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis (PHEV) (3 Of 3) › DTC U0109: Lost Communication With Fuel Pump Control Module › DTC Information › DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • CAN communication status check
  1. Poor connection
  2. CAN communication line between ECM and FPCM
  3. FPCM faulty
Enable Conditions
  • B+ is higher than 10.8V
  • IG "ON" Time greater than 0.5 sec.
Threshold Value
  • Duration of communication lost with FPCM is higher than 4 sec
Diagnostic Time
  • Continuous
MIL ON Condition
  • NO MIL
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