AutoCodes – Honda – P0117 1999 Honda Civic

P0117 1999 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit Low 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: P0117 1999 Honda Civic indicates Engine Coolant Temperature Sensor 1 Circuit Low 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 7,552

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
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0117 1999 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 P0117 1999 Honda Civic - Engine Coolant Temperature Sensor 1 Circuit Low Voltage - AutoCodes.com — P0117 1999 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0117 1999 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 circuit poor electrical connection

How to Fix the DTC P0117 1999 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 P0117 1999 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 P0117 1999 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 P0117 1999 Honda Civic Code

1. What are the common symptoms of OBDII code P0117 on a 1999 Honda Civic?

The common symptoms of code P0117 in a 1999 Honda Civic include poor fuel economy, rough idling, engine overheating, and a persistent check engine light.

2. What is the main cause of OBDII code P0117 on a 1999 Honda Civic?

The main cause of code P0117 on a 1999 Honda Civic is a malfunctioning engine coolant temperature sensor 1, which sends a low voltage signal to the engine control module.

3. How does a faulty engine coolant temperature sensor lead to a low voltage circuit in a 1999 Honda Civic?

A faulty engine coolant temperature sensor in a 1999 Honda Civic can lead to a low voltage circuit by providing incorrect temperature readings to the engine control module, resulting in an inaccurate signal indicating low voltage.

4. Can a damaged wiring harness or connector cause OBDII code P0117 on a 1999 Honda Civic?

Yes, a damaged wiring harness or connector connected to the engine coolant temperature sensor can cause code P0117 on a 1999 Honda Civic due to disrupted electrical signals.

5. Is it safe to continue driving a 1999 Honda Civic with OBDII code P0117?

It is not recommended to continue driving a 1999 Honda Civic with code P0117, as it can lead to potential engine overheating and other serious issues. It is best to address the problem promptly.

6. How can I diagnose and repair OBDII code P0117 on a 1999 Honda Civic?

To diagnose and repair code P0117 on a 1999 Honda Civic, start by checking the engine coolant temperature sensor, wiring, and connectors for any damage. Replace the sensor if necessary and clear the code to see if the issue persists.

7. Can resetting the check engine light resolve OBDII code P0117 on a 1999 Honda Civic?

Resetting the check engine light may temporarily turn it off, but it will not resolve the underlying issue causing code P0117 on a 1999 Honda Civic. Proper diagnosis and repair are necessary.

8. Are there any DIY tips for troubleshooting OBDII code P0117 on a 1999 Honda Civic?

DIY tips for troubleshooting code P0117 on a 1999 Honda Civic include visually inspecting the engine coolant temperature sensor and its connections, checking for damaged wires, and using a multimeter to test the sensor's resistance.

9. How much does it typically cost to fix OBDII code P0117 on a 1999 Honda Civic?

The cost to fix code P0117 on a 1999 Honda Civic can vary depending on the cause of the issue. On average, it may cost between $100 to $300 for parts and labor if the engine coolant temperature sensor needs replacement.

10. Can a faulty engine coolant temperature sensor affect the overall performance of a 1999 Honda Civic?

Yes, a faulty engine coolant temperature sensor can affect the overall performance of a 1999 Honda Civic by causing improper fuel mixture, inefficient engine operation, and potential overheating issues.