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Home >> Toyota >> 2005 >> Prius >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (SFI) - Diagnostics >> DTC P1121: Coolant Flow Control Valve Position Sensor Circuit Stuck >> Typical Enabling Conditions >> Potentiometer detection
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Potentiometer detection

TYPICAL ENABLING CONDITIONS

The monitor will run whenever the following DTCs are not present See LIST OF DISABLE A MONITOR 
Coolant heat storage system malfunction Not detected
Battery voltage 10 V or more
Engine coolant temperature 0°C (32°F) or more
Water valve operation Commanded
Response time of valve movement Time under calculation with valve position