P1120 2005 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 2005 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 2005 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 2005 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 2005 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 2005 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.
Need more information about the P1120 2005 Toyota Prius code?
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Frequently Asked Questions about P1120 2005 Toyota Prius Code
1. What does OBDII code P1120 on a 2005 Toyota Prius indicate?
The code P1120 signifies an issue with the Coolant Flow Control Valve Position Sensor Circuit in a 2005 Toyota Prius.
2. What are the common symptoms of a Coolant Flow Control Valve Position Sensor Circuit problem?
Common symptoms include engine overheating, poor fuel efficiency, rough idling, and a check engine light illuminated on the dashboard.
3. What are the possible causes of OBDII code P1120 in a 2005 Toyota Prius?
Potential causes include a faulty coolant flow control valve, a malfunctioning position sensor, damaged wiring or connectors in the circuit, or a problem with the Engine Control Module (ECM).
4. How can I diagnose the Coolant Flow Control Valve Position Sensor Circuit issue in my 2005 Toyota Prius?
Diagnosis involves using an OBDII scanner to retrieve the trouble code, visually inspecting the wiring and connectors for damage, testing the coolant flow control valve and position sensor, and checking the ECM for any faults.
5. Can I continue driving my 2005 Toyota Prius with the P1120 code present?
It is not recommended to drive the vehicle with the P1120 code as it can lead to further damage and potential overheating issues. It is best to address the problem promptly.
6. How can I repair the Coolant Flow Control Valve Position Sensor Circuit problem in my 2005 Toyota Prius?
Repair options include replacing the faulty coolant flow control valve, fixing any damaged wiring or connectors, replacing the position sensor if necessary, or reprogramming the ECM.
7. Is it possible to reset the OBDII code P1120 in a 2005 Toyota Prius?
While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the code to prevent it from reoccurring.
8. How much does it typically cost to fix the Coolant Flow Control Valve Position Sensor Circuit problem in a 2005 Toyota Prius?
Costs can vary depending on the specific issue, but repairs for this code can range from $200 to $500, including parts and labor.
9. Can a DIY enthusiast fix the P1120 code in a 2005 Toyota Prius?
If you have the necessary tools, knowledge, and experience working on automotive electrical systems, you may be able to address the issue yourself. However, it is recommended to consult a professional if you are unsure.
10. How often does the Coolant Flow Control Valve Position Sensor Circuit issue occur in a 2005 Toyota Prius?
While not extremely common, this issue can arise due to component wear, age, or electrical problems. Regular maintenance and prompt attention to any warning signs can help prevent this code from appearing.
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