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

P0117 Toyota Code - Engine Coolant Temperature Circuit Low Input

Quick Answer

The P0117 code for Toyota vehicles indicates a problem with the Engine Coolant Temperature (ECT) sensor circuit, specifically a low input signal. Common causes include Faulty ECT sensor, Damaged wiring or connectors in the ECT circuit, Corrosion on the ECT sensor terminals. 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 Toyota indicates Engine Coolant Temperature Circuit Low Input.
Common causes
Common causes include Faulty ECT sensor, Damaged wiring or connectors in the ECT circuit, Corrosion on the ECT sensor terminals.
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 07, 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 Toyota Description

The P0117 code for Toyota vehicles indicates a problem with the Engine Coolant Temperature (ECT) sensor circuit, specifically a low input signal. The ECT 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 to ensure optimal engine performance and efficiency.

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

Common Causes of P0117 Toyota

  1. Faulty ECT sensor
  2. Damaged wiring or connectors in the ECT circuit
  3. Corrosion on the ECT sensor terminals
  4. Malfunctioning ECM
  5. Coolant leaks affecting the ECT sensor readings

Symptoms of P0117 Toyota

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

How to Fix P0117 Toyota

  1. Begin by diagnosing the issue with a scan tool to confirm the P0117 code and identify the specific cause.
  2. Inspect the ECT sensor and its wiring for any damage or corrosion. Replace the sensor if necessary.
  3. Test the ECT sensor's resistance using a multimeter to ensure it is functioning within the manufacturer's specifications.
  4. Check the coolant level and quality to ensure it is not affecting the ECT sensor readings.
  5. Clear the fault code from the ECM and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P0117 Toyota

The typical repair costs for addressing a P0117 code on a Toyota vehicle can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It is important to note that these are rough estimates, and actual costs may vary based on factors such as the location of the repair shop, the vehicle's make and model, and the type of engine. Additionally, diagnostic time and labor rates can vary between auto repair shops, with rates generally falling between $80 and $150 per hour. It is advisable to obtain quotes from local repair shops for a more accurate cost estimate.

What does this mean?

Tech Notes for P0117 Toyota

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.









User Submitted Video

Need more information about the P0117 Toyota code?

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

Need Help with the Code?

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

Information for Specific Toyota 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 Toyota Code

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

- Common symptoms include the engine running hotter or colder than usual, poor fuel economy, and the temperature gauge showing incorrect readings.

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

- The code P0117 is typically triggered by a faulty engine coolant temperature (ECT) sensor, a wiring issue in the ECT circuit, or a problem with the ECT sensor's connector.

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

- To diagnose the code P0117, you can use a scan tool to check the ECT sensor's readings, inspect the wiring and connector for any damage, and perform a resistance test on the ECT sensor.

4. Can a bad thermostat cause the OBDII code P0117 in a Toyota?

- Yes, a malfunctioning thermostat that is stuck open can cause the engine coolant temperature to stay low, potentially triggering the OBDII code P0117.

5. What are some repair tips for fixing the OBDII code P0117 in a Toyota?

- Repair tips include replacing the faulty ECT sensor, repairing any damaged wiring or connectors, ensuring the thermostat is functioning correctly, and clearing the trouble codes with a scan tool.

6. Is it safe to continue driving with the OBDII code P0117 in my Toyota?

- It is generally not recommended to drive with the code P0117 present, as it can lead to potential engine overheating issues and other complications.

7. Can a low coolant level trigger the OBDII code P0117 in a Toyota?

- Yes, a low coolant level can affect the ECT sensor readings and potentially trigger the code P0117. It's important to check and maintain the proper coolant level in the vehicle.

8. How long does it typically take to repair the OBDII code P0117 in a Toyota?

- The repair time for the code P0117 can vary depending on the exact cause of the issue, but it can usually be resolved within a few hours by a qualified mechanic.

9. Will disconnecting the battery reset the OBDII code P0117 in a Toyota?

- Disconnecting the battery may temporarily clear the trouble code, but it is recommended to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

10. Can a dirty or corroded ECT sensor connector cause the OBDII code P0117 in a Toyota?

- Yes, a dirty or corroded ECT sensor connector can disrupt the signal between the sensor and the engine control module, leading to the code P0117. Cleaning or repairing the connector may resolve the issue.

Discuss the causes and fixes for P0117 Toyota OBDII Code

Submit a New Comment

  • My 2004 Toyota Camry VVT-i 16 valve 2.4L engine is showing engine codes P0117 and P0442. I check the thermostat, flush and bleed the coolant and replaced the engine coolant sensor but the codes remain. Any suggestion?

    Reply to Comment

  • Besides the sensor, other thigns that can cause the P0117 code is the ECM and short to ground wire from the sensor to the ECM.

    P0442 is not related to the P0117 code, that code could be just a loose gas cap.

    P0442 TOYOTA - EVAP System Small Leak Detected
    Read more: https://www.autocodes.com/p...

    Reply to Comment

  • p0117 can cause the heating problem? bcoz i have this error but heater is not working.

    Reply to Comment

  • No. Start by checking the coolant system for leak. Sounds like the coolant level is too low or there is air in the system.

    Reply to Comment