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P0116 1999 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit Range/Performance Problem

Quick Answer

The P0116 diagnostic trouble code (DTC) for a 1999 Honda Civic indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/Performance. Common causes include Faulty ECT sensor, Wiring or connector issues in the ECT sensor circuit, Corrosion or damage to the ECT sensor. 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
P0116 1999 Honda Civic indicates Engine Coolant Temperature Sensor 1 Circuit Range/Performance Problem.
Common causes
Common causes include Faulty ECT sensor, Wiring or connector issues in the ECT sensor circuit, Corrosion or damage to the ECT sensor.
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 14, 2024
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Code P0116 1999 Honda Civic Description

The P0116 diagnostic trouble code (DTC) for a 1999 Honda Civic indicates a problem with the Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/Performance. The ECT sensor is a crucial component that monitors the temperature of the engine coolant. It provides this information to the engine control module (ECM) to help regulate fuel injection, ignition timing, and other engine functions. When the ECM detects that the ECT sensor's signal is outside the expected range or is not performing as it should, it triggers the P0116 code.

OBDII Code P0116 1999 Honda Civic - Engine Coolant Temperature Sensor 1 Circuit Range/Performance Problem
P0116 1999 Honda Civic Code - Engine Coolant Temperature Sensor 1 Circuit Range/Performance Problem

Common Causes of P0116 1999 Honda Civic

  1. Faulty ECT sensor
  2. Wiring or connector issues in the ECT sensor circuit
  3. Corrosion or damage to the ECT sensor
  4. Coolant level or quality issues affecting sensor readings
  5. ECM malfunction affecting ECT sensor communication

Symptoms of P0116 1999 Honda Civic

  1. Check Engine Light illuminated
  2. Engine running rough or misfiring
  3. Poor fuel efficiency
  4. Difficulty starting the engine
  5. Engine overheating

How to Fix P0116 1999 Honda Civic

  1. Begin by diagnosing the ECT sensor using a multimeter to test its resistance and voltage readings.
  2. Inspect the wiring and connectors in the ECT sensor circuit for any damage, corrosion, or loose connections.
  3. If the ECT sensor is faulty, replace it with a new sensor compatible with the 1999 Honda Civic model.
  4. Clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue has been resolved.
  5. Monitor the engine coolant temperature readings to verify that the new ECT sensor is functioning correctly.

Cost to Fix P0116 1999 Honda Civic

The typical repair costs for addressing a P0116 code on a 1999 Honda Civic can range from $100 to $300, depending on the cost of the ECT sensor and the labor involved in the replacement. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. Factors such as location, vehicle make and model, and engine type can also influence repair costs. For a more accurate estimate, it's recommended to consult local auto repair shops.

What does this mean?

Tech Notes for P0116 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?

Coolant temperature signal sent to the ngine Control Module (ECM) is not within specified range.

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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 P0116 1999 Honda Civic Code

1. What are the common symptoms of OBDII code P0116 on a 1999 Honda Civic?

The common symptoms of OBDII code P0116 on a 1999 Honda Civic include engine overheating, poor fuel economy, rough idling, and a decrease in overall engine performance.

2. What causes the OBDII code P0116 on a 1999 Honda Civic?

The most common cause of OBDII code P0116 on a 1999 Honda Civic is a faulty engine coolant temperature sensor, which may be malfunctioning or sending incorrect signals to the engine control module.

3. How can I diagnose the OBDII code P0116 on my 1999 Honda Civic?

To diagnose OBDII code P0116 on your 1999 Honda Civic, you can use an OBDII scanner to read the code and check the engine coolant temperature sensor for proper operation. You may also inspect the wiring and connections related to the sensor for any damage or corrosion.

4. Can I continue driving my 1999 Honda Civic with OBDII code P0116?

It is not recommended to continue driving your 1999 Honda Civic with OBDII code P0116, as it can lead to potential engine damage due to incorrect temperature readings. It is best to address the issue promptly to avoid further complications.

5. How do I repair OBDII code P0116 on my 1999 Honda Civic?

To repair OBDII code P0116 on your 1999 Honda Civic, you will need to replace the engine coolant temperature sensor with a new, OEM-quality sensor. Ensure proper installation and secure connections to resolve the circuit range/performance problem.

6. Are there any DIY tips for troubleshooting OBDII code P0116 on a 1999 Honda Civic?

One DIY tip for troubleshooting OBDII code P0116 on a 1999 Honda Civic is to visually inspect the engine coolant temperature sensor and its wiring for any visible damage or loose connections before proceeding with a replacement.

7. Will resetting the OBDII code P0116 on my 1999 Honda Civic make it go away permanently?

Resetting the OBDII code P0116 on your 1999 Honda Civic may temporarily clear the code, but if the underlying issue, such as a faulty engine coolant temperature sensor, is not addressed, the code is likely to reappear.

8. Can a bad thermostat cause the OBDII code P0116 on a 1999 Honda Civic?

A bad thermostat may indirectly contribute to the OBDII code P0116 on a 1999 Honda Civic by affecting the engine coolant temperature readings. However, the primary cause of this code is typically a malfunctioning engine coolant temperature sensor.

9. How much does it cost to replace the engine coolant temperature sensor on a 1999 Honda Civic?

The cost of replacing the engine coolant temperature sensor on a 1999 Honda Civic can vary depending on the location and labor rates, but the part itself typically ranges from $20 to $50, with additional costs for labor if done by a mechanic.

10. Is OBDII code P0116 a serious issue on a 1999 Honda Civic?

OBDII code P0116 on a 1999 Honda Civic is considered a moderate issue that should be addressed promptly to prevent potential engine damage and maintain proper engine performance and fuel efficiency.

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