AutoCodes – Honda – P0118 2000 Honda Civic

P0118 2000 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit High Voltage

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 2000 Honda Civic indicates Engine Coolant Temperature Sensor 1 Circuit High Voltage.
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 20,272

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 2000 Honda Civic 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 2000 Honda Civic - Engine Coolant Temperature Sensor 1 Circuit High Voltage - AutoCodes.com — P0118 2000 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0118 2000 Honda Civic?

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 2000 Honda Civic?

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

First check to see if there are any coolant leaks and if the thermostat is opening, if problem is still there replace the coolant temperature sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0118 2000 Honda Civic 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 2000 Honda Civic 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 2000 Honda Civic Code

1. What are the common symptoms of OBDII code P0118 in a 2000 Honda Civic?

- Common symptoms include the engine temperature gauge reading high or fluctuating erratically, the Check Engine light illuminating, and potential issues with the vehicle's fuel efficiency.

2. What does the OBDII code P0118 indicate in a 2000 Honda Civic?

- OBDII code P0118 in a 2000 Honda Civic specifically refers to a high voltage condition in the Engine Coolant Temperature (ECT) Sensor 1 circuit.

3. What are the possible causes of OBDII code P0118 in a 2000 Honda Civic?

- Potential causes include a faulty Engine Coolant Temperature sensor, a problem with the sensor's wiring or connectors, low coolant levels, or issues with the engine's cooling system.

4. How can I diagnose the OBDII code P0118 in my 2000 Honda Civic?

- Diagnosis typically involves using a scan tool to read the code, testing the ECT sensor's resistance, checking the sensor's wiring for continuity, and inspecting the cooling system for any visible issues.

5. Can I still drive my 2000 Honda Civic with OBDII code P0118?

- While the vehicle may still be operational with this code, it is advisable to address the issue promptly to prevent potential overheating and engine damage.

6. Is it safe to reset the OBDII code P0118 in a 2000 Honda Civic without fixing the underlying problem?

- It is not recommended to simply reset the code without addressing the root cause, as the issue may persist and potentially lead to further complications.

7. How can I repair OBDII code P0118 in my 2000 Honda Civic?

- Repair options may include replacing the Engine Coolant Temperature sensor, repairing any damaged wiring or connectors, ensuring proper coolant levels, and addressing any cooling system issues.

8. Can a DIY enthusiast fix OBDII code P0118 in a 2000 Honda Civic?

- Depending on the individual's experience and tools available, some DIY enthusiasts may be able to address this code by following repair guides and utilizing basic automotive repair skills.

9. Will fixing OBDII code P0118 improve my 2000 Honda Civic's performance?

- Resolving this code can lead to improved engine performance, better fuel efficiency, and overall smoother operation of the vehicle.

10. How much does it cost to repair OBDII code P0118 in a 2000 Honda Civic at a mechanic?

- The cost of repairs can vary based on the specific issue causing the code, but generally, it may range from around $100 to $300, including parts and labor.