P1117 Toyota Code - Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
Quick Answer
P1117 Toyota indicates Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System. Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor for HST, Engine Coolant Temperature (ECT) sensor for HST 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
- P1117 Toyota indicates Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System.
- Common causes
- Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor for HST, Engine Coolant Temperature (ECT) sensor for HST 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 P1117 Toyota Description
What are the Possible Causes of the DTC P1117 Toyota?
- Low engine coolant level
- Faulty Engine Coolant Temperature (ECT) sensor for HST
- 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 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 P1117 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 P1117 Toyota code?
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Information for Specific Toyota Models
- P1117 2004 Toyota Prius — Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
- P1117 2005 Toyota Prius — Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
- P1117 2006 Toyota Prius — Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
- P1117 2007 Toyota Prius — Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
- P1117 2008 Toyota Prius — Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
- P1117 2009 Toyota Prius — Coolant Temperature Sensor Circuit Stack for Coolant Heat Storage System
Frequently Asked Questions about P1117 Toyota Code
1. What does the OBDII code P1117 mean for a Toyota?
P1117 indicates a problem with the Coolant Temperature Sensor Circuit for the Coolant Heat Storage System, which helps regulate engine temperature during startup.
2. What are common symptoms of P1117 in Toyota vehicles?
Symptoms may include the check engine light turning on, poor fuel efficiency, delayed engine warm-up, or inconsistent engine temperature readings.
3. What causes the P1117 code to appear in Toyota vehicles?
Common causes include a faulty coolant temperature sensor, damaged wiring or connectors, or issues with the Coolant Heat Storage System.
4. How can I diagnose the P1117 code on my Toyota?
Start by checking the coolant temperature sensor, inspecting wiring and connectors for damage, and using a scan tool to verify sensor readings.
5. Can a faulty coolant temperature sensor trigger the P1117 code?
Yes, a malfunctioning coolant temperature sensor is one of the primary causes of the P1117 code.
6. How do I fix the P1117 code on a Toyota?
Repair or replace the coolant temperature sensor, fix any damaged wiring or connectors, and ensure the Coolant Heat Storage System is functioning properly.
7. Is it safe to drive with the P1117 code present in a Toyota?
While the vehicle may still be drivable, ignoring the code can lead to poor fuel efficiency and potential damage to engine components over time.
8. How much does it cost to repair the P1117 code on a Toyota?
Repair costs vary, but replacing the coolant temperature sensor typically ranges from $50 to $150, excluding labor.
9. Can low coolant levels cause the P1117 code in Toyota vehicles?
Low coolant levels are not a direct cause but may lead to inaccurate temperature readings, contributing to system issues.
10. Will clearing the P1117 code with a scan tool fix the problem?
Clearing the code may turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.
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