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Home › Kia › 2020 › Optima Plug-In Hybrid EX › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transaxle System Diagnosis (PHEV) › DTC P1774: Speed Command PWM Line › DTC Information › DTC Detecting Condition

DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Circuit Monitoring
  1. Poor Connector Connection
  2. Faulty PCM/TCM Power Circuit
  3. Faulty PCM/TCM
Enable Conditions
  • Low battery voltage is greater than 10V
  • P-CAN BUS Off or OPU CAN Time out
Threshold value
  • Open or short in signal circuit of PWM command
Detecting Time
  • 0.2s
MIL ON Condition
  • None
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