Engine-Codes.com
Engine-Codes – Toyota – P0117 2005 Toyota Highlander

P0117 2005 Toyota Highlander Code - Engine Coolant Temperature Circuit Low Input

Quick Answer

The P0117 code in a 2005 Toyota Highlander indicates an issue with the engine coolant temperature circuit registering a low input. Common causes include Faulty engine coolant temperature sensor, Damaged or corroded sensor connector, Wiring issue in the coolant temperature circuit. 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 2005 Toyota Highlander indicates Engine Coolant Temperature Circuit Low Input.
Common causes
Common causes include Faulty engine coolant temperature sensor, Damaged or corroded sensor connector, Wiring issue in the coolant temperature circuit.
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 09, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0117 2005 Toyota Highlander Description

The P0117 code in a 2005 Toyota Highlander indicates an issue with the engine coolant temperature circuit registering a low input. 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). The ECM uses this data to adjust fuel delivery and ignition timing for optimal engine performance and efficiency. When the sensor detects a low input, it means that the engine coolant temperature is lower than expected, which can lead to various performance issues.

OBDII Code P0117 2005 Toyota Highlander - Engine Coolant Temperature Circuit Low Input
P0117 2005 Toyota Highlander Code - Engine Coolant Temperature Circuit Low Input

Common Causes of P0117 2005 Toyota Highlander

  1. Faulty engine coolant temperature sensor
  2. Damaged or corroded sensor connector
  3. Wiring issue in the coolant temperature circuit
  4. Low coolant levels causing inaccurate temperature readings

Symptoms of P0117 2005 Toyota Highlander

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Difficulty starting the engine
  4. Engine overheating
  5. Check Engine Light illuminated on the dashboard

How to Fix P0117 2005 Toyota Highlander

  1. Begin by diagnosing the issue with a scan tool to confirm the P0117 code and identify the specific cause.
  2. Inspect the engine coolant temperature sensor and its connector for any damage or corrosion. Replace the sensor if necessary.
  3. Check the wiring in the coolant temperature circuit for any breaks or shorts. Repair or replace any damaged wiring.
  4. Verify the coolant levels in the system and top up if needed to ensure accurate temperature readings.
  5. Clear the code from the ECM and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0117 2005 Toyota Highlander

The typical repair costs for addressing a P0117 code in a 2005 Toyota Highlander can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's recommended to check local rates for a more precise estimate. Keep in mind that rates may be higher in metropolitan areas or at dealerships, while independent shops often charge less for repairs.

When is the Code Detected?

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

Need more information about the P0117 2005 Toyota Highlander code?

Need more information on how to fix the P0117 2005 Toyota Highlander code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0117 2005 Toyota Highlander code diagnosed by a professional: Find a repair shop in your area

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 2005 Toyota Highlander Code

1. What are the common symptoms of OBDII code P0117 in a 2005 Toyota Highlander?

The common symptoms of code P0117 in a 2005 Toyota Highlander include poor fuel economy, rough idling, and the engine running hotter than normal.

2. What does the OBDII code P0117 indicate in a 2005 Toyota Highlander?

Code P0117 in a 2005 Toyota Highlander indicates a low input signal from the engine coolant temperature (ECT) sensor.

3. What are the possible causes of OBDII code P0117 in a 2005 Toyota Highlander?

Possible causes of code P0117 in a 2005 Toyota Highlander include a faulty ECT sensor, damaged wiring or connectors, low coolant level, or a malfunctioning engine control module (ECM).

4. How can I diagnose the OBDII code P0117 in a 2005 Toyota Highlander?

To diagnose code P0117 in a 2005 Toyota Highlander, you can use a scan tool to check for the code, test the ECT sensor using a multimeter, inspect the wiring and connectors for damage, and ensure the coolant level is adequate.

5. Can I still drive my 2005 Toyota Highlander with OBDII code P0117?

It is not recommended to drive your 2005 Toyota Highlander with code P0117, as it can lead to poor engine performance and potential overheating issues. It is best to address the problem promptly.

6. How can I repair OBDII code P0117 in my 2005 Toyota Highlander?

To repair code P0117 in a 2005 Toyota Highlander, you may need to replace the ECT sensor, repair any damaged wiring or connectors, top up the coolant level, or reprogram the ECM if necessary.

7. Will resetting the check engine light fix OBDII code P0117 in a 2005 Toyota Highlander?

Resetting the check engine light may temporarily turn it off, but it will not fix the underlying issue causing code P0117 in a 2005 Toyota Highlander. Proper diagnosis and repair are required.

8. How important is it to fix OBDII code P0117 in a 2005 Toyota Highlander?

It is crucial to fix code P0117 in a 2005 Toyota Highlander promptly to prevent potential engine damage, overheating, and poor fuel efficiency. Ignoring the issue can lead to more severe problems.

9. Can a DIY enthusiast fix OBDII code P0117 in a 2005 Toyota Highlander?

If you have the necessary tools and knowledge, a DIY enthusiast may be able to fix code P0117 in a 2005 Toyota Highlander by following proper diagnostic procedures and making the required repairs.

10. How much does it cost to repair OBDII code P0117 in a 2005 Toyota Highlander?

The cost to repair code P0117 in a 2005 Toyota Highlander can vary depending on the specific cause of the issue. Costs may include the price of a new ECT sensor, wiring repairs, or diagnostic services if performed by a professional mechanic.

Discuss the causes and fixes for P0117 2005 Toyota Highlander OBDII Code

Submit a New Comment

Code P0117 2005 Toyota Highlander comments

No comments found for this page.