Engine-Codes.com
Engine-Codes – Toyota – P0118 2018 Toyota RAV4

P0118 2018 Toyota RAV4 Code - Engine Coolant Temperature Circuit High Input

Quick Answer

The P0118 code for a 2018 Toyota RAV4 indicates a problem with the Engine Coolant Temperature (ECT) Circuit, specifically a high input signal. Common causes include Faulty ECT sensor, Corrosion or damage to ECT sensor wiring, Coolant level too low. 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 2018 Toyota RAV4 indicates Engine Coolant Temperature Circuit High Input.
Common causes
Common causes include Faulty ECT sensor, Corrosion or damage to ECT sensor wiring, Coolant level too low.
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 16, 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 P0118 2018 Toyota RAV4 Description

The P0118 code for a 2018 Toyota RAV4 indicates a problem with the Engine Coolant Temperature (ECT) Circuit, specifically a high 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). When the ECM detects a high voltage signal from the ECT sensor that is outside of the normal operating range, it triggers the P0118 code.

OBDII Code P0118 2018 Toyota RAV4 - Engine Coolant Temperature Circuit High Input
P0118 2018 Toyota RAV4 Code - Engine Coolant Temperature Circuit High Input

Common Causes of P0118 2018 Toyota RAV4

  1. Faulty ECT sensor
  2. Corrosion or damage to ECT sensor wiring
  3. Coolant level too low
  4. Air pockets in the cooling system
  5. Faulty ECM

Symptoms of P0118 2018 Toyota RAV4

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

How to Fix P0118 2018 Toyota RAV4

  1. Begin by diagnosing the issue using a scan tool to confirm the P0118 code and check the ECT sensor's readings.
  2. Inspect the ECT sensor and its wiring for any signs of damage or corrosion. Replace the sensor if necessary.
  3. Check the coolant level and bleed any air from the cooling system to ensure proper operation.
  4. Clear the code from the ECM's memory and test drive the vehicle to verify that the issue has been resolved.
  5. If the problem persists, further diagnostics may be needed to identify any underlying issues with the ECM or other components.

Cost to Fix P0118 2018 Toyota RAV4

The cost of repairing a P0118 code on a 2018 Toyota RAV4 can vary depending on the specific cause of the issue. In general, replacing the ECT sensor and addressing any related wiring issues can cost between $100 and $300 for parts and labor. Additional diagnostic time and potential ECM replacement could increase the total cost. It is recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the specific circumstances of your vehicle. Keep in mind that labor rates can vary between different locations and types of repair facilities.

What does this mean?

Tech Notes for P0118 2018 Toyota RAV4

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.

Need more information about the P0118 2018 Toyota RAV4 code?

Need more information on how to fix the P0118 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0118 2018 Toyota RAV4 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 P0118 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code P0118 in a 2018 Toyota RAV4?

The common symptoms of OBDII code P0118 in a 2018 Toyota RAV4 include the engine overheating, inaccurate temperature gauge readings, and potential issues with the vehicle's fuel efficiency.

2. What can cause the OBDII code P0118 in a 2018 Toyota RAV4?

The OBDII code P0118 in a 2018 Toyota RAV4 is often caused by a faulty engine coolant temperature sensor, a malfunctioning thermostat, low coolant levels, or issues with the wiring or connectors related to the coolant temperature circuit.

3. How serious is the OBDII code P0118 in a 2018 Toyota RAV4?

The OBDII code P0118 indicating an Engine Coolant Temperature Circuit High Input in a 2018 Toyota RAV4 is a serious issue that should be addressed promptly. Ignoring this code can lead to engine damage due to overheating.

4. Can I still drive my 2018 Toyota RAV4 with the OBDII code P0118?

It is not recommended to drive your 2018 Toyota RAV4 with the OBDII code P0118, especially if you notice symptoms like engine overheating or erratic temperature gauge readings. Continuing to drive the vehicle in this condition can cause further damage.

5. How can I diagnose and repair the OBDII code P0118 in my 2018 Toyota RAV4?

To diagnose and repair the OBDII code P0118 in your 2018 Toyota RAV4, you can start by checking the coolant level, inspecting the coolant temperature sensor and its wiring, testing the thermostat, and ensuring proper connections in the circuit.

6. Can a DIY enthusiast fix the OBDII code P0118 in a 2018 Toyota RAV4?

While some DIY enthusiasts may have the skills to address the OBDII code P0118 in a 2018 Toyota RAV4, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair to ensure the issue is resolved effectively.

7. Will resetting the OBDII code P0118 in my 2018 Toyota RAV4 make it go away permanently?

Resetting the OBDII code P0118 in your 2018 Toyota RAV4 may temporarily clear the code, but if the underlying issue causing the high input in the engine coolant temperature circuit is not fixed, the code is likely to reappear.

8. How much does it cost to repair the OBDII code P0118 in a 2018 Toyota RAV4?

The cost to repair the OBDII code P0118 in a 2018 Toyota RAV4 can vary depending on the exact cause of the issue, parts needed for replacement, and labor costs. It is advisable to get a repair estimate from a trusted mechanic.

9. What are the long-term effects of ignoring the OBDII code P0118 in a 2018 Toyota RAV4?

Ignoring the OBDII code P0118 in a 2018 Toyota RAV4 can lead to severe engine damage, decreased fuel efficiency, and potential safety hazards if the engine overheats. It is crucial to address this issue promptly.

10. Is the OBDII code P0118 covered under warranty for a 2018 Toyota RAV4?

The coverage of repairs related to the OBDII code P0118 in a 2018 Toyota RAV4 under warranty depends on the specific terms of the vehicle's warranty. It is recommended to check with the dealership or refer to the warranty documentation for clarification.

Discuss the causes and fixes for P0118 2018 Toyota RAV4 OBDII Code

Submit a New Comment

Code P0118 2018 Toyota RAV4 comments

No comments found for this page.