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Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System Diagnosis (PHEV) >> DTC P1777: OPU Power Control Circuit Failure >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Circuit Monitoring
  1. OPU Low Voltage Connector (Pin No. 18)/High Voltage Connector (Pin No. 2, 3) Contact Inferiority or Circuit Open/Short
  2. Faulty OPU
  3. Faulty EOP
Enable Conditions CASE 1/2/3
  • Low battery voltage is between 9V and 16V
Threshold Value CASE 1/2
  • IGBT Driver and internal circuit faulty
CASE 3
  • IGBT temperature sensor voltage is between 4V and 4.74V
Detecting Time CASE 1/2
  • 0.72s
CASE 3
  • 2s
MIL ON Condition
  • 1 Driving Cycle
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