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Engine-Codes – Scion – P0117 Scion

P0117 Scion Code - Engine Coolant Temperature Circuit Low Input

Quick Answer

The P0117 Scion code indicates that there is a problem with the engine coolant temperature sensor circuit, specifically that the input voltage is lower than the normal operating range. Common causes include Faulty engine coolant temperature sensor, Damaged wiring or connectors in the circuit, Malfunctioning ECM. 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
P0117 Scion indicates Engine Coolant Temperature Circuit Low Input.
Common causes
Common causes include Faulty engine coolant temperature sensor, Damaged wiring or connectors in the circuit, Malfunctioning ECM.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P0117 Scion Description

The P0117 Scion code indicates that there is a problem with the engine coolant temperature sensor circuit, specifically that the input voltage is lower than the normal operating range. The engine coolant temperature sensor is responsible for monitoring the temperature of the engine coolant and sending this information to the engine control module (ECM). This data is crucial for the ECM to adjust fuel delivery and ignition timing to optimize engine performance and efficiency.

OBDII Code P0117 Scion - Engine Coolant Temperature Circuit Low Input
P0117 Scion Code - Engine Coolant Temperature Circuit Low Input

Common Causes of P0117 Scion

  1. Faulty engine coolant temperature sensor
  2. Damaged wiring or connectors in the circuit
  3. Malfunctioning ECM
  4. Low coolant levels
  5. Corrosion or debris in the sensor or connector

Symptoms of P0117 Scion

  1. Check engine light is illuminated
  2. Poor fuel economy
  3. Engine overheating
  4. Rough idling
  5. Stalling

How to Fix P0117 Scion

  1. Begin by diagnosing the issue using a scan tool to retrieve the specific trouble code.
  2. Inspect the engine coolant temperature sensor, wiring, and connectors for any signs of damage or corrosion.
  3. Test the engine coolant temperature sensor using a multimeter to ensure it is functioning correctly.
  4. Replace the engine coolant temperature sensor if it is found to be faulty, damaged, or inaccurate.
  5. Clear the trouble code from the ECM's memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0117 Scion

The typical repair costs for addressing a P0117 Scion code can range from $100 to $300, including parts and labor. However, specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check local rates for a more precise estimate. Labor rates typically range between $80 and $150 per hour, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops.

What does this mean?

Tech Notes for P0117 Scion

Start by checking the engine coolant level at the coolant reservoir, a low level may indicate a coolant leak. If the coolant level is correct, you should replace the Engine Coolant Temperature (ECT) sensor to fix the problem. The Engine Coolant Thermostat must be replaced every time there is a repair with the coolant system.

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Information for Specific Scion Models

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0117 Scion Code

1. What are the common symptoms of OBDII code P0117 in a Scion?

The common symptoms of code P0117 in a Scion include issues with the engine cooling system, such as overheating, poor fuel economy, rough idling, and a possible check engine light.

2. What causes the OBDII code P0117 in a Scion?

The most common cause of code P0117 in a Scion is a malfunctioning engine coolant temperature (ECT) sensor, which may be sending incorrect signals to the engine control module (ECM).

3. How can I diagnose the OBDII code P0117 in my Scion?

To diagnose code P0117, you can use an OBDII scanner to read the code and check the ECT sensor for proper resistance values. Additionally, you can visually inspect the wiring and connectors related to the ECT sensor for any signs of damage.

4. Can a faulty thermostat cause OBDII code P0117 in a Scion?

Yes, a faulty thermostat can cause code P0117 in a Scion. A thermostat stuck in the open position can prevent the engine from reaching the correct operating temperature, leading to a low input signal error.

5. How do I repair OBDII code P0117 in my Scion?

To repair code P0117, you may need to replace the engine coolant temperature sensor if it is faulty. Additionally, checking and replacing the thermostat if necessary can help resolve the issue.

6. Is it safe to continue driving my Scion with OBDII code P0117?

It is not recommended to continue driving your Scion with OBDII code P0117, as it can lead to potential engine performance issues and overheating problems. It is best to address the underlying cause of the code promptly.

7. Can a dirty or low coolant level trigger OBDII code P0117 in a Scion?

Yes, a dirty or low coolant level can affect the accuracy of the engine coolant temperature sensor readings, potentially triggering code P0117 in a Scion. Ensure that the coolant level is adequate and clean.

8. Will resetting the check engine light resolve OBDII code P0117 in a Scion?

Resetting the check engine light may temporarily turn off the warning indicator, but it will not address the underlying issue causing code P0117. It is essential to diagnose and fix the root cause of the problem.

9. How much does it cost to fix OBDII code P0117 in a Scion?

The cost of fixing code P0117 in a Scion can vary depending on the cause of the issue. Replacing the engine coolant temperature sensor or thermostat can cost anywhere from $50 to $200, including parts and labor.

10. Can a DIY enthusiast repair OBDII code P0117 in a Scion?

Yes, a DIY enthusiast with the necessary tools and knowledge can attempt to repair code P0117 in a Scion by replacing the engine coolant temperature sensor or thermostat. However, if unsure, it's best to consult a professional mechanic.

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