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P0118 2020 Honda CR-V Code - Engine Coolant Temperature Sensor 1 Circuit High Voltage

Quick Answer

The P0118 code on a 2020 Honda CR-V indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit registering high voltage. Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Corroded or damaged wiring in the ECT circuit, ECM malfunction. 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 2020 Honda CR-V indicates Engine Coolant Temperature Sensor 1 Circuit High Voltage.
Common causes
Common causes include Faulty Engine Coolant Temperature (ECT) sensor, Corroded or damaged wiring in the ECT circuit, ECM malfunction.
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 13, 2024
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Code P0118 2020 Honda CR-V Description

The P0118 code on a 2020 Honda CR-V indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit registering high voltage. The ECT sensor is a crucial component that monitors the temperature of the engine coolant and sends this information to the engine control module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing for optimal engine performance and efficiency. When the ECT sensor reports high voltage, it means that the engine coolant temperature is higher than expected, which can lead to various issues.

OBDII Code P0118 2020 Honda CR-V - Engine Coolant Temperature Sensor 1 Circuit High Voltage
P0118 2020 Honda CR-V Code - Engine Coolant Temperature Sensor 1 Circuit High Voltage

Common Causes of P0118 2020 Honda CR-V

  1. Faulty Engine Coolant Temperature (ECT) sensor.
  2. Corroded or damaged wiring in the ECT circuit.
  3. ECM malfunction.
  4. Coolant leak leading to inaccurate temperature readings.
  5. Cooling system issues causing overheating.

Symptoms of P0118 2020 Honda CR-V

  1. Check Engine Light illuminated on the dashboard.
  2. Engine running hotter than normal.
  3. Poor fuel economy.
  4. Engine misfires or rough idling.
  5. Difficulty starting the engine.

How to Fix P0118 2020 Honda CR-V

  1. Begin by diagnosing the issue using a scan tool to confirm the P0118 code and identify the specific cause.
  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 quality, ensuring there are no leaks or air pockets in the system.
  4. Test the ECM to determine if it is functioning correctly or needs to be replaced.
  5. Clear the code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0118 2020 Honda CR-V

The typical repair costs for addressing a P0118 code on a 2020 Honda CR-V can range from $100 to $300, including parts and labor. However, it is important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is recommended to inquire about local rates for a more accurate estimate.

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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 2020 Honda CR-V Code

1. What are the common symptoms of OBDII code P0118 in a 2020 Honda CR-V?

The common symptoms include the engine running hotter than normal, a drop in fuel efficiency, the temperature gauge showing maximum or erratic readings, and potential issues with the vehicle's heater operation.

2. What can cause the OBDII code P0118 in a 2020 Honda CR-V?

The primary cause of P0118 is a malfunction or failure of the Engine Coolant Temperature (ECT) Sensor 1 circuit, resulting in high voltage output. This can be due to a faulty sensor, damaged wiring, or a poor electrical connection.

3. How does the Engine Coolant Temperature Sensor 1 work in a 2020 Honda CR-V?

The Engine Coolant Temperature Sensor 1 monitors the temperature of the engine coolant and sends this information to the engine control module (ECM). The ECM uses this data to adjust fuel delivery and ignition timing for optimal engine performance.

4. Can driving with OBDII code P0118 in a 2020 Honda CR-V cause further damage?

Continuing to drive with code P0118 can potentially lead to poor engine performance, overheating, or other issues. It is recommended to address the problem promptly to prevent any long-term damage to the engine.

5. How can I diagnose and repair OBDII code P0118 in my 2020 Honda CR-V?

Diagnosing P0118 involves testing the Engine Coolant Temperature Sensor, checking the wiring for damage, and verifying the sensor's resistance values. Repair typically involves replacing the faulty sensor or repairing any damaged wiring.

6. Is it safe to reset the OBDII code P0118 without fixing the underlying issue in a 2020 Honda CR-V?

Resetting the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely recur. It is best to diagnose and repair the problem to ensure proper functionality of the engine coolant temperature system.

7. Can a DIY enthusiast fix OBDII code P0118 in a 2020 Honda CR-V?

Depending on your skill level and tools available, it is possible to replace the Engine Coolant Temperature Sensor 1 as a DIY project. However, if you are unsure about diagnosing the issue, it is recommended to seek professional assistance.

8. How much does it cost to repair OBDII code P0118 in a 2020 Honda CR-V at a dealership?

The cost of repairing P0118 at a dealership can vary based on the extent of the damage and parts required. On average, the repair cost can range from $100 to $300, including parts and labor.

9. Will OBDII code P0118 affect the emissions of a 2020 Honda CR-V?

Yes, a malfunctioning Engine Coolant Temperature Sensor can impact emissions by affecting the engine's fuel mixture and combustion efficiency. Resolving P0118 can help maintain proper emission levels and overall engine performance.

10. How often should the Engine Coolant Temperature Sensor be replaced in a 2020 Honda CR-V?

The Engine Coolant Temperature Sensor is a wear item and may need replacement over time due to wear and tear. It is recommended to follow the manufacturer's maintenance schedule and replace the sensor as needed to ensure accurate temperature readings.

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