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Engine-Codes – Toyota – P0117 2006 Toyota Highlander

P0117 2006 Toyota Highlander Code - Engine Coolant Temperature Circuit Low Input

Quick Answer

The P0117 code for a 2006 Toyota Highlander indicates an issue with the Engine Coolant Temperature Circuit Low Input. Common causes include Faulty ECT sensor, Damaged or corroded wiring/connectors in the ECT circuit, Low 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
P0117 2006 Toyota Highlander indicates Engine Coolant Temperature Circuit Low Input.
Common causes
Common causes include Faulty ECT sensor, Damaged or corroded wiring/connectors in the ECT circuit, Low 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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code P0117 2006 Toyota Highlander Description

The P0117 code for a 2006 Toyota Highlander indicates an issue with the Engine Coolant Temperature Circuit Low Input. This means that the Engine Control Module (ECM) has detected a lower than normal voltage from the Engine Coolant Temperature (ECT) sensor. The ECT sensor is responsible for measuring the temperature of the engine coolant and sending this data to the ECM, which uses it to adjust various engine functions such as fuel delivery and ignition timing.

OBDII Code P0117 2006 Toyota Highlander - Engine Coolant Temperature Circuit Low Input
P0117 2006 Toyota Highlander Code - Engine Coolant Temperature Circuit Low Input

Common Causes of P0117 2006 Toyota Highlander

  1. Faulty ECT sensor
  2. Damaged or corroded wiring/connectors in the ECT circuit
  3. Low coolant level
  4. Thermostat stuck open
  5. ECM malfunction

Symptoms of P0117 2006 Toyota Highlander

  1. Check Engine Light is illuminated on the dashboard
  2. Engine running hotter or colder than usual
  3. Poor fuel economy
  4. Rough idling or stalling
  5. Difficulty starting the engine

How to Fix P0117 2006 Toyota Highlander

  1. Begin by checking the coolant level in the radiator and topping it up if necessary.
  2. Inspect the wiring and connectors in the ECT circuit for any damage or corrosion. Repair or replace as needed.
  3. Test the ECT sensor using a multimeter to determine if it is functioning properly. Replace the sensor if it is faulty.
  4. Check the thermostat to ensure it is opening and closing correctly. Replace if necessary.
  5. Clear the diagnostic trouble codes from the ECM using a scan tool and monitor the system to ensure the issue has been resolved.

Cost to Fix P0117 2006 Toyota Highlander

The typical repair cost for addressing a P0117 code in a 2006 Toyota Highlander can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary depending on factors such as location, vehicle make and model, and engine type. It is advisable to check with local shops to get a more accurate estimate for this repair.

When is the Code Detected?

An excessively low voltage from the sensor is sent to ECM.

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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 2006 Toyota Highlander Code

1. What are the common symptoms of OBDII code P0117 in a 2006 Toyota Highlander?

The common symptoms include engine overheating, rough idling, poor fuel economy, and the temperature gauge showing abnormally low readings.

2. What does the OBDII code P0117 "Engine Coolant Temperature Circuit Low Input" mean for a 2006 Toyota Highlander?

This code indicates that the Engine Control Module (ECM) has detected a low input signal from the engine coolant temperature sensor.

3. What are the possible causes of OBDII code P0117 in a 2006 Toyota Highlander?

Common causes include a faulty engine coolant temperature sensor, damaged wiring or connectors in the coolant temperature circuit, low coolant level, or a malfunctioning ECM.

4. How can I diagnose the issue causing OBDII code P0117 in my 2006 Toyota Highlander?

You can use a multimeter to test the engine coolant temperature sensor, inspect the wiring and connectors for any damage, and check the coolant level to diagnose the problem accurately.

5. What are the repair options for resolving OBDII code P0117 in a 2006 Toyota Highlander?

Repair options include replacing the faulty engine coolant temperature sensor, repairing damaged wiring or connectors, ensuring the coolant level is correct, and resetting the ECM after making necessary repairs.

6. Can I continue driving my 2006 Toyota Highlander with OBDII code P0117 present?

It is not recommended to drive the vehicle with this code active, as it can lead to engine overheating, potential damage, and poor performance. It is best to address the issue promptly.

7. How much does it typically cost to repair OBDII code P0117 in a 2006 Toyota Highlander?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor, excluding diagnostic fees.

8. Will resetting the OBDII code P0117 in a 2006 Toyota Highlander make it go away permanently?

Simply resetting the code may temporarily clear the error, but if the underlying issue causing the code is not resolved, it is likely to reappear after some time.

9. Can a DIY enthusiast repair OBDII code P0117 in a 2006 Toyota Highlander?

Yes, some repairs related to this code can be done by DIY enthusiasts, such as replacing the engine coolant temperature sensor or checking and repairing wiring issues. However, complex diagnostic tasks may require professional assistance.

10. How important is it to address OBDII code P0117 promptly in a 2006 Toyota Highlander?

It is crucial to address this code promptly to prevent potential engine damage, overheating, and performance issues. Ignoring the issue can lead to more severe problems down the line.

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