AutoCodes – Toyota – P0118 2006 Toyota Prius

P0118 2006 Toyota Prius Code - Engine Coolant Temperature Circuit High Input

Quick Answer

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat. 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: P0118 2006 Toyota Prius indicates Engine Coolant Temperature Circuit High Input.
Common causes: Common causes include Low engine coolant level, Faulty Engine Coolant Temperature (ECT) sensor, Faulty engine coolant thermostat.
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.

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Code Popularity 4,567

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0118 2006 Toyota Prius Description

The Engine Coolant Temperature (ECT) sensor is used to detect the engine coolant temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine coolant temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.

OBDII Code P0118 2006 Toyota Prius - Engine Coolant Temperature Circuit High Input - AutoCodes.com — P0118 2006 Toyota Prius Code - Engine Coolant Temperature Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0118 2006 Toyota Prius?

Low engine coolant level
Faulty Engine Coolant Temperature (ECT) sensor
Faulty engine coolant thermostat
Engine Coolant Temperature (ECT) sensor harness is open or shorted
Engine Coolant Temperature (ECT) sensor electrical circuit poor connection

How to Fix the DTC P0118 2006 Toyota Prius?

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 does this mean?

Code Tech Notes

If there are no coolant leaks, replace the thermostat first, if problem is still there check/replace coolant temperature sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0118 2006 Toyota Prius 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 P0118 2006 Toyota Prius code?

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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 P0118 2006 Toyota Prius Code

1. What are the common symptoms of OBDII code P0118 in a 2006 Toyota Prius?

- Common symptoms include the vehicle running hot or overheating, the temperature gauge reading high, and the check engine light being illuminated.

2. What does the OBDII code P0118 indicate in a 2006 Toyota Prius?

- OBDII code P0118 indicates a high input signal from the engine coolant temperature sensor in the 2006 Toyota Prius.

3. What are the possible causes of OBDII code P0118 in a 2006 Toyota Prius?

- Possible causes include a faulty engine coolant temperature sensor, a wiring issue in the coolant temperature circuit, or a problem with the engine control module (ECM).

4. How can I diagnose the cause of OBDII code P0118 in my 2006 Toyota Prius?

- To diagnose the issue, you can use a scan tool to check the actual coolant temperature reading, inspect the wiring and connectors for damage, and test the engine coolant temperature sensor for proper operation.

5. Can I still drive my 2006 Toyota Prius with OBDII code P0118?

- It is not recommended to drive the vehicle with OBDII code P0118, as it can lead to engine overheating and potential damage. It's best to address the issue promptly.

6. How can I repair OBDII code P0118 in my 2006 Toyota Prius?

- Repair options may include replacing the engine coolant temperature sensor, repairing any damaged wiring or connectors, or reprogramming the engine control module (ECM) if necessary.

7. Will resetting the check engine light fix OBDII code P0118 in my 2006 Toyota Prius?

- Simply resetting the check engine light will not fix the underlying issue causing OBDII code P0118. It's important to diagnose and repair the root cause of the problem.

8. How much does it typically cost to repair OBDII code P0118 in a 2006 Toyota Prius?

- The cost of repairing OBDII code P0118 can vary depending on the specific issue. Costs may include parts and labor for sensor replacement or wiring repairs.

9. Can a DIY enthusiast fix OBDII code P0118 in a 2006 Toyota Prius?

- While some DIY enthusiasts may have the skills to address OBDII code P0118, it's important to have the necessary tools, knowledge, and experience for diagnosing and repairing this issue correctly.

10. How often does OBDII code P0118 occur in a 2006 Toyota Prius?

- OBDII code P0118 can occur sporadically or persistently in a 2006 Toyota Prius, depending on the underlying cause. Regular maintenance and prompt attention to any warning lights can help prevent this issue.