AutoCodes – Toyota – P0115 2018 Toyota RAV4

P0115 2018 Toyota RAV4 Code - Engine Coolant Temperature Circuit Malfunction

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: P0115 2018 Toyota RAV4 indicates Engine Coolant Temperature Circuit Malfunction.
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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 588

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
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0115 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 P0115 2018 Toyota RAV4 - Engine Coolant Temperature Circuit Malfunction - AutoCodes.com — P0115 2018 Toyota RAV4 Code - Engine Coolant Temperature Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P0115 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 P0115 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 P0115 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 P0115 2018 Toyota RAV4 code?

Need more information on how to fix the P0115 2018 Toyota RAV4 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0115 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 P0115 2018 Toyota RAV4 Code

1. What are the common symptoms of OBDII code P0115 in a 2018 Toyota RAV4?

The common symptoms of P0115 include inaccurate temperature readings on the dashboard, engine overheating, poor fuel economy, and potential issues with the vehicle's heater performance.

2. What are the possible causes of the Engine Coolant Temperature Circuit Malfunction in a 2018 Toyota RAV4?

Common causes of P0115 in a 2018 Toyota RAV4 include a faulty engine coolant temperature sensor, damaged wiring or connectors in the coolant temperature circuit, low coolant levels, or a malfunctioning engine control module (ECM).

3. How can I diagnose the cause of OBDII code P0115 in my 2018 Toyota RAV4?

To diagnose P0115, you can use a diagnostic scanner to retrieve the fault code and check the engine coolant temperature sensor's resistance, inspect the wiring and connectors for damage, verify coolant levels, and test the ECM for proper functioning.

4. Can I continue driving my 2018 Toyota RAV4 with OBDII code P0115?

It is not recommended to continue driving your RAV4 with P0115 as it can lead to engine overheating, potential damage, and decreased fuel efficiency. It's best to address the issue promptly to avoid further complications.

5. How can I repair OBDII code P0115 in my 2018 Toyota RAV4?

To repair P0115, you may need to replace the engine coolant temperature sensor, repair any damaged wiring or connectors, top up coolant levels if necessary, and reset the fault code using a diagnostic scanner.

6. Will resetting the OBDII code P0115 in my 2018 Toyota RAV4 solve the issue?

Resetting the fault code may temporarily clear the warning light, but if the underlying issue causing P0115 is not addressed, the code is likely to reappear. It's essential to diagnose and fix the root cause of the problem.

7. How much does it cost to fix OBDII code P0115 on a 2018 Toyota RAV4?

The cost of fixing P0115 can vary depending on the exact cause of the issue, the need for replacement parts, and labor charges. It's recommended to consult a professional mechanic for an accurate estimate.

8. Can a DIY enthusiast repair OBDII code P0115 in a 2018 Toyota RAV4?

If you have the necessary tools, knowledge, and experience working on automotive systems, you may be able to tackle P0115 yourself. However, it's crucial to ensure you correctly diagnose the problem and perform repairs safely.

9. What happens if I ignore OBDII code P0115 in my 2018 Toyota RAV4?

Ignoring P0115 can lead to potential engine damage, overheating, reduced fuel efficiency, and other performance issues. It's best to address the problem promptly to prevent further complications.

10. How long does it take to fix OBDII code P0115 in a 2018 Toyota RAV4?

The time required to fix P0115 can vary based on the specific repairs needed, such as sensor replacement or wiring repairs. It could take a few hours to a day, depending on the complexity of the issue and the availability of parts.