AutoCodes – Honda – P0118 1997 Honda Civic

P0118 1997 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 1997 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 13,274

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 1997 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 1997 Honda Civic - Engine Coolant Temperature Sensor 1 Circuit High Voltage - AutoCodes.com — P0118 1997 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0118 1997 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 1997 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 1997 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 1997 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 1997 Honda Civic Code

1. What does OBDII code P0118 on a 1997 Honda Civic indicate?

- OBDII code P0118 on a 1997 Honda Civic refers to the Engine Coolant Temperature Sensor 1 Circuit High Voltage.

2. What are the common symptoms of a P0118 code on a 1997 Honda Civic?

- Common symptoms of a P0118 code include inaccurate temperature gauge readings, engine overheating, poor fuel economy, and potential rough idling.

3. What are the possible causes of a P0118 code on a 1997 Honda Civic?

- Possible causes of a P0118 code include a faulty engine coolant temperature sensor, damaged wiring or connectors, low coolant levels, or a problem with the cooling system.

4. How can I diagnose a P0118 code on my 1997 Honda Civic?

- To diagnose a P0118 code, you can use a scan tool to read the code, check the engine coolant temperature sensor's resistance, inspect the wiring and connectors for any damage, and verify the coolant level and cooling system operation.

5. Can I drive my 1997 Honda Civic with a P0118 code?

- It is not recommended to drive your 1997 Honda Civic with a P0118 code, as it can lead to engine overheating and potential damage. It is best to address the issue promptly.

6. How do I repair a P0118 code on my 1997 Honda Civic?

- To repair a P0118 code, you may need to replace the engine coolant temperature sensor, repair any damaged wiring or connectors, ensure proper coolant levels, and address any cooling system issues.

7. Will resetting the trouble codes fix a P0118 code on my 1997 Honda Civic?

- Resetting the trouble codes may temporarily clear the P0118 code, but if the underlying issue is not addressed, the code is likely to reappear. It is essential to diagnose and repair the root cause of the problem.

8. Can a P0118 code on a 1997 Honda Civic affect fuel economy?

- Yes, a P0118 code can affect fuel economy on a 1997 Honda Civic because it can lead to incorrect fuel mixture ratios and engine performance issues.

9. How much does it cost to fix a P0118 code on a 1997 Honda Civic?

- The cost to fix a P0118 code on a 1997 Honda Civic can vary depending on the exact cause of the issue, but it may involve replacing the engine coolant temperature sensor, which can range from $50 to $150, plus labor costs.

10. Is it possible to prevent a P0118 code from appearing on my 1997 Honda Civic?

- Regular maintenance of the cooling system, checking coolant levels, and addressing any issues promptly can help prevent a P0118 code from appearing on your 1997 Honda Civic.