AutoCodes – Acura – P0116 Acura

P0116 Acura Code - Engine Coolant Temperature Sensor 1 Circuit Range/Performance Problem

Quick Answer

The Powertrain Control Module (PCM) supplies voltage to the engine coolant temperature signal circuit (about 5 V) through a pull-up resistor. Common causes include Faulty Engine Coolant Temperature (ECT) Sensor 1, Engine Coolant Temperature Sensor 1 harness is open or shorted, Engine Coolant Temperature Sensor 1 circuit poor electrical connection. 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 Acura indicates Engine Coolant Temperature Sensor 1 Circuit Range/Performance Problem.
Common causes: Common causes include Faulty Engine Coolant Temperature (ECT) Sensor 1, Engine Coolant Temperature Sensor 1 harness is open or shorted, Engine Coolant Temperature Sensor 1 circuit poor electrical connection.
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 17,478

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 Jul 31, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0116 Acura Description

The Powertrain Control Module (PCM) supplies voltage to the engine coolant temperature signal circuit (about 5 V) through a pull-up resistor. As the engine coolant cools, the Engine Coolant Temperature (ECT) Sensor 1 resistance increases and the PCM detects a high signal voltage. As the engine coolant warms, the ECT Sensor 1 resistance decreases, and the PCM detects a low signal voltage. If the ECT Sensor 1 output voltage does not reach a set temperature after starting the engine and driving at a set time, or when the difference between the ECT Sensor 1 output voltage while driving and the output voltage of ECT Sensor 1 after the engine has been stopped a certain length of time does not change a certain amount, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).

OBDII Code P0116 Acura - Engine Coolant Temperature Sensor 1 Circuit Range/Performance Problem - AutoCodes.com — P0116 Acura Code - Engine Coolant Temperature Sensor 1 Circuit Range/Performance Problem

What does this mean?

What are the Possible Causes of the DTC P0116 Acura?

Faulty Engine Coolant Temperature (ECT) Sensor 1
Engine Coolant Temperature Sensor 1 harness is open or shorted
Engine Coolant Temperature Sensor 1 circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0116 Acura?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0116 Acura 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 P0116 Acura 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 P0116 Acura Code

1. What are common symptoms of an OBDII code P0116 in an Acura?

- Common symptoms include issues with engine performance, poor fuel economy, overheating, and possibly a check engine light.

2. What could cause the OBDII code P0116 in an Acura?

- The code P0116 in an Acura is usually caused by a faulty engine coolant temperature sensor, wiring issues, or a problem with the sensor circuit.

3. How can I diagnose the cause of an OBDII code P0116 in my Acura?

- To diagnose the issue, you can use a scan tool to read the code, check the engine coolant temperature sensor's resistance, inspect the sensor's wiring, and test the sensor's voltage.

4. Can I drive my Acura with an OBDII code P0116?

- It is not recommended to drive your Acura with an OBDII code P0116, as it can lead to engine overheating and other potential issues.

5. How can I repair an OBDII code P0116 in my Acura?

- The most common repair for the OBDII code P0116 in an Acura is to replace the engine coolant temperature sensor. Ensure proper installation and wiring connections.

6. What are the consequences of ignoring an OBDII code P0116 in an Acura?

- Ignoring the OBDII code P0116 in an Acura can lead to engine overheating, reduced fuel efficiency, and potential damage to engine components.

7. Can a faulty thermostat cause the OBDII code P0116 in an Acura?

- Yes, a faulty thermostat can contribute to the OBDII code P0116 by causing incorrect engine temperature readings. It is recommended to check and replace the thermostat if necessary.

8. How long does it take to replace the engine coolant temperature sensor in an Acura?

- Replacing the engine coolant temperature sensor in an Acura typically takes around 30 minutes to an hour, depending on the model and accessibility of the sensor.

9. Is it possible to reset the OBDII code P0116 in an Acura without fixing the issue?

- While you can clear the code temporarily, it is not recommended to reset the code without addressing the underlying issue, as it will likely reappear once the problem persists.

10. Can a dirty or low coolant level trigger the OBDII code P0116 in an Acura?

- Yes, a dirty or low coolant level can affect the engine coolant temperature sensor readings and potentially trigger the OBDII code P0116. Ensure proper coolant maintenance.