P1122 2007 Toyota Prius Code - Coolant Flow Control Valve Position Sensor Circuit Low
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
- P1122 2007 Toyota Prius indicates Coolant Flow Control Valve Position Sensor Circuit Low.
- 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 P1122 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 P1122 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 P1122 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 P1122 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 P1122 2007 Toyota Prius Code
What does the OBDII code P1122 mean for a 2007 Toyota Prius?
The code P1122 indicates that the coolant flow control valve position sensor circuit is reading a low voltage, which can affect the engine's cooling system and performance.
What are common symptoms of the P1122 code in a Toyota Prius?
Common symptoms include engine overheating, poor fuel efficiency, check engine light illumination, and erratic engine performance.
What could cause the P1122 code to trigger in a 2007 Toyota Prius?
Causes may include a faulty coolant flow control valve position sensor, damaged wiring or connectors, or issues with the engine control module (ECM).
How can I diagnose the P1122 code?
To diagnose the P1122 code, start by visually inspecting the wiring and connectors for damage, then test the coolant flow control valve position sensor using a multimeter for proper voltage readings.
What are some common repairs for the P1122 code?
Common repairs include replacing the coolant flow control valve position sensor, repairing or replacing damaged wiring, or addressing issues with the ECM.
Can I drive my Prius with the P1122 code?
While it's possible to drive with the P1122 code, it is not recommended, as it can lead to overheating and potential engine damage if the coolant flow is not properly regulated.
How much does it typically cost to fix the P1122 code?
Repair costs can vary widely, but expect to pay between $100 and $400, depending on whether you need to replace the sensor, repair wiring, or diagnose other related issues.
Is the P1122 code related to the vehicle's cooling system?
Yes, the P1122 code is directly related to the coolant flow control valve, which is crucial for managing the vehicle's cooling system and maintaining optimal engine temperatures.
Will clearing the P1122 code fix the problem?
Clearing the P1122 code may temporarily turn off the check engine light, but it will not fix the underlying issue. Proper diagnosis and repair are necessary to prevent the code from returning.
Discuss the causes and fixes for P1122 2007 Toyota Prius OBDII Code
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