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P0117 2000 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage

Quick Answer

The P0117 diagnostic trouble code (DTC) for a 2000 Honda Civic indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit showing low voltage. Common causes include Faulty ECT sensor, The sensor itself may be malfunctioning and providing incorrect voltage readings to the ECM, Damaged wiring or connectors. 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 2000 Honda Civic indicates Engine Coolant Temperature Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Faulty ECT sensor, The sensor itself may be malfunctioning and providing incorrect voltage readings to the ECM, Damaged wiring or connectors.
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 2000 Honda Civic Description

The P0117 diagnostic trouble code (DTC) for a 2000 Honda Civic indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit showing low voltage. The ECT sensor is a crucial component that monitors the temperature of the engine coolant and provides this information to the Engine Control Module (ECM). The ECM uses this data to adjust the fuel mixture, ignition timing, and other engine functions to ensure optimal performance and efficiency.

OBDII Code P0117 2000 Honda Civic - Engine Coolant Temperature Sensor 1 Circuit Low Voltage
P0117 2000 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit Low Voltage

Common Causes of P0117 2000 Honda Civic

  1. Faulty ECT sensor - The sensor itself may be malfunctioning and providing incorrect voltage readings to the ECM.
  2. Damaged wiring or connectors - Any damage to the wiring or connectors in the ECT sensor circuit can disrupt the voltage signal sent to the ECM.
  3. Corrosion or contamination - Corrosion or contamination in the ECT sensor circuit can interfere with the voltage readings.
  4. ECM issues - In rare cases, a problem with the ECM itself can cause the low voltage condition in the ECT sensor circuit.

Symptoms of P0117 2000 Honda Civic

  1. Poor fuel economy - The ECM may not be able to adjust the fuel mixture properly based on inaccurate coolant temperature readings, leading to decreased fuel efficiency.
  2. Rough idling - Incorrect temperature data from the ECT sensor can cause the engine to idle erratically or stall.
  3. Difficulty starting the engine - A faulty ECT sensor may prevent the engine from starting easily, especially in cold weather.
  4. Engine overheating - If the ECM receives incorrect temperature information, it may not activate the cooling system properly, leading to engine overheating.

How to Fix P0117 2000 Honda Civic

  1. Diagnose the issue - Use a multimeter to test the ECT sensor and its circuit for proper voltage readings. Check for any damaged wiring or connectors.
  2. Replace the ECT sensor - If the sensor is faulty, replace it with a new one that meets the manufacturer's specifications.
  3. Repair damaged wiring or connectors - If there is any damage to the wiring or connectors, repair or replace them as needed.
  4. Clear the DTC - After completing the repair, clear the DTC from the ECM using a diagnostic scan tool to reset the check engine light.
  5. Test drive the vehicle - Take the vehicle for a test drive to ensure that the issue has been resolved and that the engine operates smoothly.

Cost to Fix P0117 2000 Honda Civic

The typical repair costs for addressing a P0117 DTC on a 2000 Honda Civic can vary depending on the specific cause of the issue. In general, replacing an ECT sensor can cost between $50 and $100 for the part, with additional labor costs ranging from $50 to $100. If there are wiring or connector issues that need to be repaired, the total cost may increase. Additionally, diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It's recommended to check with local shops for a more accurate cost estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for P0117 2000 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.

Need more information about the P0117 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 P0117 2000 Honda Civic Code

1. What are the common symptoms of OBDII code P0117 in a 2000 Honda Civic?

- Common symptoms include poor fuel economy, rough idling, engine overheating, and the Check Engine light illuminating.

2. What does the OBDII code P0117 indicate in a 2000 Honda Civic?

- OBDII code P0117 indicates a low voltage condition in the Engine Coolant Temperature Sensor 1 circuit.

3. What are the possible causes of OBDII code P0117 in a 2000 Honda Civic?

- Possible causes include a faulty engine coolant temperature sensor, damaged wiring or connectors, low coolant levels, or a malfunctioning thermostat.

4. How can I diagnose the cause of OBDII code P0117 in my 2000 Honda Civic?

- You can use a multimeter to test the engine coolant temperature sensor's resistance, check the wiring and connectors for damage, and inspect the coolant level and thermostat.

5. Can I continue driving my 2000 Honda Civic with OBDII code P0117?

- It is not recommended to drive your vehicle with this code as it can lead to engine overheating and potential damage. It's best to address the issue promptly.

6. How can I repair OBDII code P0117 in my 2000 Honda Civic?

- Repair options may include replacing the engine coolant temperature sensor, repairing or replacing damaged wiring or connectors, topping up coolant levels, or replacing a faulty thermostat.

7. Will resetting the Check Engine light resolve OBDII code P0117 in a 2000 Honda Civic?

- Resetting the Check Engine light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to reappear.

8. How much does it typically cost to fix OBDII code P0117 in a 2000 Honda Civic?

- The cost can vary depending on the exact cause of the issue, but replacing the engine coolant temperature sensor or repairing wiring may range from $100 to $300 at a repair shop.

9. Can a DIY enthusiast easily fix OBDII code P0117 in a 2000 Honda Civic?

- Depending on your skill level, you may be able to replace the engine coolant temperature sensor or check the wiring yourself. However, more complex diagnostics may require professional help.

10. How important is it to address OBDII code P0117 promptly in a 2000 Honda Civic?

- It is important to address this issue promptly to prevent potential engine damage, ensure proper engine performance, and maintain optimal fuel efficiency.

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