AutoCodes – Toyota – P0118 2018 Toyota RAV4

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

Quick Answer

The engine coolant temperature sensor is used to monitor the engine coolant temperature. Common causes include Low engine coolant level, Faulty Engine Coolant Thermostat, Faulty Engine Coolant Temperature (ECT) sensor. 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 Low engine coolant level, Faulty Engine Coolant Thermostat, Faulty Engine Coolant Temperature (ECT) sensor.
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 2,943

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 Aug 23, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0118 2018 Toyota RAV4 Description

The engine coolant temperature sensor is used to monitor the engine coolant temperature. The engine coolant temperature sensor has a thermistor with a resistance that varies according to the temperature of the engine coolant. When the coolant temperature is low, the resistance in the thermistor increases. When the temperature is high, the resistance drops. These variations in resistance are reflected in the output voltage from the sensor. The Engine Control Module (ECM) monitors the sensor voltage and uses this value to calculate the engine coolant temperature. When the sensor output voltage deviates from the normal operating range, the ECM interprets this as a fault in the engine coolant temperature sensor circuit and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0118 2018 Toyota RAV4 - Engine Coolant Temperature Circuit High Input - AutoCodes.com — P0118 2018 Toyota RAV4 Code - Engine Coolant Temperature Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0118 2018 Toyota RAV4?

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

How to Fix the DTC P0118 2018 Toyota RAV4?

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

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0118 2018 Toyota RAV4 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 2018 Toyota RAV4 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 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.