DTC P1121 Coolant Flow Control Valve Position Sensor Circuit Stuck: Description

DTC TROUBLE DETECTION CONDITION CHART

DTC No.	DTC Detection Condition	Trouble Area
P1121	Water valve position sensor output voltage: No change despite the ECM sending a valve control signal or slow response CHS tank outlet temperature sensor output: 60°C (140°F) or more (when hot coolant recovering starts) CHS tank outlet temperature sensor output: No change although the hot coolant is recovered	Water valve Cooling system (clogging) ECM