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Home >> Kia >> 2021 >> Niro Plug-In Hybrid LXS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (PHEV) (5 Of 6) >> DTC P1521-00: Engine Coolant Temperature Sensor Circuit High (Exhaust Heat Recovery System) >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible Cause
DTC Strategy
  • Signal check, high
  • Poor connector connection
  • Open or short to battery in signal circuit
  • Open in ground circuit
  • Faulty EHRS
Enable Condition
  • Auxiliary battery voltage (6~16V)
Threshold Value
  • Sensor voltage is greater than 4.9V
Diagnostic Time
  • -
MIL ON Condition
  • -
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