P1122 Toyota 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 Toyota 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 Toyota 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 Toyota?
- 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 Toyota?
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 Toyota 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 P1122 Toyota code?
Need more information on how to fix the P1122 Toyota code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P1122 Toyota code diagnosed by a professional: Find a repair shop in your area
Information for Specific Toyota Models
- P1122 2004 Toyota Prius — Coolant Flow Control Valve Position Sensor Circuit Low
- P1122 2005 Toyota Prius — Coolant Flow Control Valve Position Sensor Circuit Low
- P1122 2006 Toyota Prius — Coolant Flow Control Valve Position Sensor Circuit Low
- P1122 2007 Toyota Prius — Coolant Flow Control Valve Position Sensor Circuit Low
- P1122 2008 Toyota Prius — Coolant Flow Control Valve Position Sensor Circuit Low
- P1122 2009 Toyota Prius — Coolant Flow Control Valve Position Sensor Circuit Low
Frequently Asked Questions about P1122 Toyota Code
1. What are the common symptoms of OBDII code P1122 in a Toyota related to the Coolant Flow Control Valve Position Sensor Circuit Low?
- Common symptoms include engine overheating, loss of engine power, rough idling, and potential stalling.
2. What are the possible causes of OBDII code P1122 in a Toyota related to the Coolant Flow Control Valve Position Sensor Circuit Low?
- Possible causes include a faulty coolant flow control valve, damaged wiring or connectors, low coolant level, or a malfunctioning engine control module.
3. How can I diagnose the issue causing OBDII code P1122 in a Toyota related to the Coolant Flow Control Valve Position Sensor Circuit Low?
- Diagnosis involves performing a thorough inspection of the coolant flow control valve, checking the wiring and connectors for damage, testing the coolant level, and using a scan tool to retrieve additional fault codes.
4. What is the repair process for addressing OBDII code P1122 in a Toyota related to the Coolant Flow Control Valve Position Sensor Circuit Low?
- The repair process may involve replacing the coolant flow control valve, repairing any damaged wiring or connectors, topping up the coolant level, or reprogramming the engine control module.
5. Can I continue driving my Toyota with OBDII code P1122 related to the Coolant Flow Control Valve Position Sensor Circuit Low?
- It is not recommended to drive your vehicle with this code as it can lead to engine overheating and potentially cause more severe damage if left unaddressed.
6. How much does it typically cost to repair OBDII code P1122 in a Toyota related to the Coolant Flow Control Valve Position Sensor Circuit Low?
- The cost of repair can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor.
7. Are there any preventive measures to avoid OBDII code P1122 in a Toyota related to the Coolant Flow Control Valve Position Sensor Circuit Low?
- Regular maintenance of the cooling system, checking coolant levels, and addressing any cooling system issues promptly can help prevent this code from occurring.
8. Can a DIY enthusiast with some automotive knowledge repair OBDII code P1122 in a Toyota related to the Coolant Flow Control Valve Position Sensor Circuit Low?
- While some aspects of the repair may be possible for a DIY enthusiast, diagnosing and repairing electrical issues like this code may require specialized tools and expertise.
9. How urgent is it to address OBDII code P1122 in a Toyota related to the Coolant Flow Control Valve Position Sensor Circuit Low?
- It is recommended to address this code as soon as possible to prevent engine damage and ensure the safe operation of your vehicle.
10. Is OBDII code P1122 related to the Coolant Flow Control Valve Position Sensor Circuit Low a common issue in Toyota vehicles?
- While it may not be the most common issue, some Toyota models may experience this code due to various factors affecting the coolant flow control valve and sensor circuit.
Discuss the causes and fixes for P1122 Toyota OBDII Code
Code P1122 Toyota comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
