P1117 2009 Toyota Prius Code - Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
Quick Answer
This system uses an electric pump to supply hot coolant stored in the coolant 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 Heat Storage Tank, Faulty Engine Coolant Temperature (ECT) sensor for CHS (Coolant Heat Storage), Low engine coolant level. 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
- P1117 2009 Toyota Prius indicates Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System.
- Common causes
- Common causes include Coolant Heat Storage Tank, Faulty Engine Coolant Temperature (ECT) sensor for CHS (Coolant Heat Storage), Low engine coolant level.
- 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 P1117 2009 Toyota Prius Description
What are the Possible Causes of the DTC P1117 2009 Toyota Prius?
- Coolant Heat Storage Tank
- Faulty Engine Coolant Temperature (ECT) sensor for CHS (Coolant Heat Storage)
- Low engine coolant level
- Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted
- Engine Coolant Temperature (ECT) sensor for HST electrical circuit poor connection
- Faulty engine coolant thermostat
How to Fix the DTC P1117 2009 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 P1117 2009 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 P1117 2009 Toyota Prius code?
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Frequently Asked Questions about P1117 2009 Toyota Prius Code
1. What are the common symptoms of OBDII code P1117 in a 2009 Toyota Prius?
The common symptoms include poor fuel economy, engine overheating, rough idle, and an illuminated check engine light.
2. What does the OBDII code P1117 in a 2009 Toyota Prius indicate?
This code specifically refers to an issue with the Coolant Temperature Sensor Circuit Stack for the Coolant Heat Storage System.
3. What are the possible causes of OBDII code P1117 in a 2009 Toyota Prius?
Possible causes include a faulty coolant temperature sensor, wiring issues, a malfunctioning thermostat, or problems with the engine control module (ECM).
4. How can I diagnose the OBDII code P1117 in my 2009 Toyota Prius?
Diagnosis involves using an OBDII scanner to retrieve the trouble code, checking the coolant temperature sensor and its circuit for proper functioning, and inspecting related components for any signs of damage or malfunction.
5. Can a faulty coolant temperature sensor cause code P1117 in a 2009 Toyota Prius?
Yes, a faulty coolant temperature sensor can trigger this code as it directly affects the operation of the Coolant Heat Storage System in the vehicle.
6. What are some repair tips for addressing OBDII code P1117 in a 2009 Toyota Prius?
Repair tips include checking and replacing the coolant temperature sensor if necessary, inspecting and repairing any damaged wiring, ensuring the thermostat is functioning correctly, and resetting the trouble code after repairs.
7. Is it safe to continue driving my 2009 Toyota Prius with OBDII code P1117?
It is not recommended to drive the vehicle with this code present, as it can lead to engine overheating and other potential issues. Prompt diagnosis and repair are advised.
8. Can I reset the OBDII code P1117 in my 2009 Toyota Prius without fixing the underlying issue?
While you can clear the code with an OBDII scanner, it is important to address the root cause of the problem to prevent the code from reappearing and ensure the proper functioning of the vehicle.
9. How much does it typically cost to repair OBDII code P1117 in a 2009 Toyota Prius?
The repair costs can vary depending on the specific issue causing the code, but it may involve replacing the coolant temperature sensor, fixing wiring problems, or addressing other related components. Costs can range from a few hundred to over a thousand dollars.
10. Can I fix OBDII code P1117 in my 2009 Toyota Prius myself, or should I take it to a professional mechanic?
While some DIY enthusiasts may be able to address this code themselves, it is recommended to consult a professional mechanic, especially if you are not familiar with diagnosing and repairing automotive electrical systems.
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