What does a coolant control valve do?
Coolant switch valves control the coolant flow in side-flow cooling circuits of the powertrain and in the heating circuits of passenger compartments. In hybrid and electric vehicles, they can be used for coolant flow distribution, e.g. for cooling the battery and power electronics.
What are the symptoms of a bad heater control valve?
Here are some of the warning signs of a bad heater control valve:
- No heat comes out.
- Heat is always on and you can’t turn it down.
- Heater operates erratically, putting out more or less heat without any control changes.
- Coolant leaks.
- Low coolant level.
- Higher-than-normal temperature gauge readings (from loss of coolant)
What kind of coolant does a 2008 Prius take?
Prestone 50/50 Coolant/Antifreeze.
What causes code P0121?
When code P0121 occurs, it means that your Engine Control Module (ECM) recognized that your throttle position “A” circuit’s expected output voltage has either gone above or below the sensor’s expected range.
How much does it cost to repair a p1121 Toyota Prius?
Cost of diagnosing the P1121 2008 TOYOTA PRIUS code Labor: 1.0 The cost of diagnosing the P1121 2008 TOYOTA PRIUS code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour. P1121 2008 TOYOTA PRIUS Possible Symptoms
What causes a check engine light on a Toyota Prius?
The Check Engine Light may illuminate with a fault code P1121 stored. It is commonly caused by a failed three way coolant control valve. Valve replacement is recommended if this occurs. The average cost for a Toyota Prius Check Engine Light Diagnosis & Testing is between $88 -$111.
Why is the water valve on my Prius so slow?
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).
Is the coolant control valve on my 2005 Prius working?
My 2005 Prius now has over 270,000 miles and the valve is working fine. DIY, it’s not hard and only cost about $100. The check engine light came on. I took it to my local Toyota dealer and was told it was the coolant control valve. The charge for this would be just under $400.00 to fix. Am taking it to another shop for a second opinion/cost.