P1120 2007 Toyota Prius Code - Coolant Flow Control Valve Position Sensor Circuit
Quick Answer
This system uses an electric pump to supply hot coolant stored in the heat storage tank into the cylinder head of the engine, in order to optimize engine starting combustion and reduce the amount of unburned gas that is discharged while the engine is started. Common causes include Coolant Flow Control Valve, Faulty Coolant Flow Control Valve Position Sensor, Coolant Flow Control Valve Position Sensor harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1120 2007 Toyota Prius indicates Coolant Flow Control Valve Position Sensor Circuit.
- Common causes
- Common causes include Coolant Flow Control Valve, Faulty Coolant Flow Control Valve Position Sensor, Coolant Flow Control Valve Position Sensor harness is open or shorted.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1120 2007 Toyota Prius Description
The water valve for the Coolant Heat Storage (CHS) system, which is located at the heater hoses, controls the coolant passages to the engine, heater core, and the CHS tank in accordance with the operating conditions of the system.
The water valve consists of a water valve, valve position sensor, and valve control motor. The potentiometer, which is coupled coaxially to the water valve, converts the valve position into voltage and transmits it to the ECM in the form of a position signal.
What are the Possible Causes of the DTC P1120 2007 Toyota Prius?
- Coolant Flow Control Valve
- 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 to Fix the DTC P1120 2007 Toyota Prius?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1120 2007 Toyota Prius code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1120 2007 Toyota Prius Code
What does the OBDII code P1120 mean for a 2007 Toyota Prius?
The OBDII code P1120 indicates a problem with the coolant flow control valve position sensor circuit, which can affect the engine's cooling system and overall performance.
What are the common symptoms of the P1120 code in a 2007 Toyota Prius?
Common symptoms include poor engine performance, overheating, fluctuating engine temperature, and the check engine light being illuminated.
What could cause the P1120 code to trigger in a 2007 Toyota Prius?
Possible causes include a faulty coolant flow control valve position sensor, wiring issues such as shorts or breaks in the circuit, or a malfunctioning engine control module (ECM).
How can I diagnose the P1120 code in my 2007 Toyota Prius?
To diagnose the P1120 code, use an OBDII scanner to confirm the code, inspect the wiring and connectors for damage, test the coolant flow control valve position sensor, and check the ECM for faults.
What are some repair tips for fixing the P1120 code in a 2007 Toyota Prius?
Repair tips include replacing the coolant flow control valve position sensor if faulty, repairing any damaged wiring or connectors, and resetting the ECU after repairs to clear the code.
Is it safe to drive my 2007 Toyota Prius with the P1120 code?
While it may be safe to drive short distances, it is advisable to address the issue promptly to prevent potential overheating or engine damage.
How much does it typically cost to repair the P1120 code in a 2007 Toyota Prius?
Repair costs can vary widely but typically range from $100 to $500, depending on whether a sensor replacement, wiring repair, or more extensive work is needed.
Can I clear the P1120 code myself, and will it come back?
You can clear the code using an OBDII scanner, but if the underlying issue is not resolved, the code will likely return after some driving.
What should I do if the P1120 code keeps reappearing after repairs?
If the code keeps reappearing, consider rechecking the connections and wiring, testing the sensor again, and ensuring there are no other related issues affecting the cooling system.
Discuss the causes and fixes for P1120 2007 Toyota Prius OBDII Code
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