P1121 2005 TOYOTA PRIUS Code - Coolant Flow Control Valve Position Sensor Circuit Stuck
|P1121 2005 TOYOTA PRIUS code possible causes
- Coolant Flow Control Valve (Stuck or Clogged Cooling System)
- Faulty Coolant Flow Control Valve Position Sensor
- Coolant Flow Control Valve Position Sensor harness is open or shorted
- Coolant Flow Control Valve Position Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
|How is the P1121 2005 TOYOTA PRIUS code repair?Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
|P1121 2005 TOYOTA PRIUS code tech notesThere is a Factory Service Bulletin for the 2005 Toyota Prius:
2005 Toyota Prius Factory Service Bulletin OBDII Code P1121
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|What is the cost to diagnose the P1121 2005 TOYOTA PRIUS code
Labor: 1.0The cost to diagnose the P1121 2005 TOYOTA PRIUS code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
|What are P1121 2005 TOYOTA PRIUS code possible symptoms?
- Engine Light ON (or Service Engine Soon Warning Light)
|What is P1121 2005 TOYOTA PRIUS code meaning?The Engine Control Module (ECM) monitors the position of the water valve based on the valve position signal that is output by the water valve position sensor (potentiometer), which is coupled coaxially to the valve. The water valve effects control in three steps as indicated above, and the ECM determines the position of the valve according to the voltage of the respective step. In order to ensure the proper monitoring of the water valve, the ECM checks for malfunctions with the combination of the output of the potentiometer and Coolant Heat Storage (CHS) tank outlet temperature sensor. If no changes occur in the valve position signal that is being inputted into the ECM or if the response signal from the water valve is very slow, despite of the ECM commanding the water valve motor to operate the ECM determines that malfunction has occurred in the water valve position sensor circuit, and sets a Diagnostic Trouble Code (DTC).
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