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Engine-Codes – Honda – P0117 1999 Honda Civic

P0117 1999 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The P0117 diagnostic trouble code (DTC) for a 1999 Honda Civic indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit registering a low voltage. Common causes include Faulty ECT sensor, Wiring issues (shorts, opens, or corrosion), 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
P0117 1999 Honda Civic indicates Engine Coolant Temperature Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Faulty ECT sensor, Wiring issues (shorts, opens, or corrosion), 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 11, 2024
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Code P0117 1999 Honda Civic Description

The P0117 diagnostic trouble code (DTC) for a 1999 Honda Civic indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit registering a low 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, ignition timing, and other engine functions to ensure optimal performance and efficiency.

OBDII Code P0117 1999 Honda Civic - Engine Coolant Temperature Sensor 1 Circuit Low Voltage
P0117 1999 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage

Common Causes of P0117 1999 Honda Civic

  1. Faulty ECT sensor
  2. Wiring issues (shorts, opens, or corrosion)
  3. ECM malfunction
  4. Coolant temperature gauge malfunction
  5. Coolant level too low

Symptoms of P0117 1999 Honda Civic

  1. Poor fuel economy
  2. Rough idle
  3. Engine hesitation when accelerating
  4. Engine overheating
  5. Check Engine Light illuminated

How to Fix P0117 1999 Honda Civic

  1. Begin by visually inspecting the ECT sensor and its wiring for any obvious signs of damage or corrosion.
  2. Test the ECT sensor using a multimeter to check for proper resistance values at different temperatures.
  3. Check the wiring harness for continuity and repair any damaged wires.
  4. If the sensor and wiring are in good condition, consider testing the ECM for proper operation.
  5. Clear the trouble code after repairs are completed and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0117 1999 Honda Civic

The cost of repairing a P0117 code on a 1999 Honda Civic can vary depending on the specific cause of the issue. In general, the price for parts such as a new ECT sensor can range from $20 to $100. Labor costs at an auto repair shop typically range from $80 to $150 per hour. Overall, the total repair costs for addressing a P0117 code on a 1999 Honda Civic could range from $100 to $300, including parts and labor. It's advisable to contact local auto repair shops for more accurate pricing based on your location and vehicle specifics.

What does this mean?

Tech Notes for P0117 1999 Honda Civic

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.

When is the Code Detected?

An excessively low voltage from the sensor is sent to ECM.

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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.

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