AutoCodes – Honda – P0118 1996 Honda Civic

P0118 1996 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 1996 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.

Save to My Repairs Step-by-Step Diagnostic Guide My Repairs

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

Code Popularity 10,436

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
Add Comment

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

Code P0118 1996 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 1996 Honda Civic - Engine Coolant Temperature Sensor 1 Circuit High Voltage - AutoCodes.com — P0118 1996 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0118 1996 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 1996 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 1996 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 1996 Honda Civic code?

Need more information on how to fix the P0118 1996 Honda Civic code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0118 1996 Honda Civic 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 P0118 1996 Honda Civic Code

1. What are the common symptoms of OBDII code P0118 in a 1996 Honda Civic?

- Common symptoms include the engine running hotter than usual, a decrease in fuel efficiency, and the temperature gauge showing unusually high readings.

2. What does the OBDII code P0118 "Engine Coolant Temperature Sensor 1 Circuit High Voltage" mean for a 1996 Honda Civic?

- This code indicates that the Engine Coolant Temperature (ECT) sensor is reporting a high voltage signal to the engine control module (ECM), suggesting a potential issue with the sensor or its circuit.

3. What are the possible causes of OBDII code P0118 in a 1996 Honda Civic?

- The potential causes include a faulty ECT sensor, a disconnected or damaged ECT sensor wiring harness, a corroded or loose connector, or issues with the ECM.

4. How can I diagnose the OBDII code P0118 in a 1996 Honda Civic?

- To diagnose the issue, you can use a multimeter to test the ECT sensor's resistance, check the wiring and connectors for any visible damage, and scan the ECM for any related trouble codes.

5. Can I continue driving my 1996 Honda Civic with the OBDII code P0118 present?

- It is not recommended to drive with this code as it can lead to poor engine performance, reduced fuel efficiency, and potential overheating issues.

6. How can I repair OBDII code P0118 in my 1996 Honda Civic?

- The repair typically involves replacing the Engine Coolant Temperature sensor, ensuring the wiring harness is properly connected and in good condition, and clearing the trouble codes with a diagnostic tool.

7. Are there any tips for preventing OBDII code P0118 from recurring in my 1996 Honda Civic?

- Regular maintenance, including checking the coolant level and system, inspecting the ECT sensor and wiring for any signs of wear, and addressing any engine overheating issues promptly, can help prevent the code from reoccurring.

8. Will resetting the OBDII code P0118 in my 1996 Honda Civic solve the issue?

- Resetting the code may temporarily clear the Check Engine Light, but it will not fix the underlying problem causing the high voltage signal from the ECT sensor.

9. Can a DIY enthusiast fix OBDII code P0118 in a 1996 Honda Civic?

- Depending on your mechanical skills and tools available, replacing the ECT sensor and checking the wiring connections can be a DIY-friendly repair for this code.

10. Is it necessary to visit a mechanic for OBDII code P0118 in a 1996 Honda Civic?

- While some DIY repairs are possible for this code, if you are unsure about diagnosing or fixing the issue, it is recommended to consult a qualified mechanic to ensure proper resolution and prevent further damage.