AutoCodes – GMC – P0116 GMC

P0116 GMC Code - Engine Coolant Temperature Sensor Performance

Quick Answer

The Engine Coolant Temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (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 GMC indicates Engine Coolant Temperature Sensor Performance.
Common causes: Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (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.

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Code Popularity 1,984

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 30, 2024

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0116 GMC Description

The Engine Coolant Temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. The Engine Control Module (ECM) supplies 5 V to the ECT sensor signal circuit and a ground for the low reference circuit.
The ECM uses this high side coolant rationality diagnostic to determine if the input from the ECT sensor is skewed warmer than normal. The internal clock of the ECM will record the amount of time the ignition is OFF. If the calibrated ignition OFF time is met at start-up, the ECM will compare the temperature difference between the ECT and the intake air temperature (IAT) to determine if the temperatures are within an acceptable operating range of each other. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a temperature difference at power-up that indicates that the ECT sensor is 30° C (86° F) warmer than the IAT sensor for less than 1 s.

OBDII Code P0116 GMC - Engine Coolant Temperature Sensor Performance - AutoCodes.com — P0116 GMC Code - Engine Coolant Temperature Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P0116 GMC?

Low engine coolant level
Leaking or stuck open thermostat
Faulty Engine Coolant Temperature (ECT) sensor
Engine Coolant Temperature sensor harness is open or shorted
Engine Coolant Temperature sensor electrical circuit poor connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0116 GMC?

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

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0116 GMC 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 GMC code?

Need more information on how to fix the P0116 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0116 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P0116 2014 GMC Sierra — Engine Coolant Temperature Sensor Performance
P0116 2015 GMC Sierra — Engine Coolant Temperature Sensor Performance
P0116 2016 GMC Sierra — Engine Coolant Temperature Sensor Performance
P0116 2017 GMC Sierra — Engine Coolant Temperature Sensor Performance
P0116 2018 GMC Sierra — Engine Coolant Temperature Sensor Performance

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 GMC Code

1. What are the common symptoms of OBDII code P0116 in a GMC related to the Engine Coolant Temperature Sensor Performance?

The common symptoms include inaccurate temperature readings on the dashboard, poor fuel economy, engine overheating, and potential stalling or rough idling.

2. What are the typical causes of OBDII code P0116 in a GMC?

The code P0116 in a GMC is often caused by a faulty engine coolant temperature sensor, a damaged sensor connector, wiring issues, low coolant levels, or a malfunctioning thermostat.

3. How can I diagnose the Engine Coolant Temperature Sensor for performance issues in my GMC?

To diagnose the Engine Coolant Temperature Sensor, you can use a multimeter to test the sensor's resistance, inspect the sensor and its wiring for physical damage, and check the coolant level and system for any irregularities.

4. Can a DIY enthusiast repair OBDII code P0116 in a GMC related to the Engine Coolant Temperature Sensor Performance?

Yes, depending on the root cause, a DIY enthusiast can replace the engine coolant temperature sensor, repair or replace damaged wiring or connectors, and refill or bleed the coolant system to address the P0116 code.

5. Are there any quick tips to troubleshoot OBDII code P0116 in a GMC before seeking professional assistance?

Before seeking professional help, you can start by checking the coolant level, inspecting the sensor's wiring and connector for any visible damage, and ensuring that the sensor is properly seated and functioning correctly.

6. Will driving with OBDII code P0116 in a GMC cause any further damage to the vehicle?

Continued driving with code P0116 in a GMC can result in poor engine performance, reduced fuel efficiency, potential engine overheating, and in some cases, further damage to engine components if the root cause is not addressed promptly.

7. How important is the Engine Coolant Temperature Sensor in a GMC and why should I address OBDII code P0116 promptly?

The Engine Coolant Temperature Sensor is crucial for monitoring engine temperature and adjusting fuel mixture. Promptly addressing code P0116 in a GMC is essential to prevent potential engine damage, poor performance, and reduced fuel efficiency.

8. Can extreme weather conditions affect the performance of the Engine Coolant Temperature Sensor in a GMC and trigger code P0116?

Yes, extreme weather conditions such as very cold or hot temperatures can affect the performance of the Engine Coolant Temperature Sensor, leading to inaccurate readings and triggering code P0116 in a GMC.

9. How long does it typically take to repair OBDII code P0116 related to the Engine Coolant Temperature Sensor in a GMC?

The repair time for OBDII code P0116 in a GMC can vary depending on the root cause. Simple fixes like sensor replacement can be completed within an hour, while more complex issues may take longer and require professional assistance.

10. Are there any recalls or technical service bulletins related to OBDII code P0116 in GMC vehicles?

It's recommended to check with GMC or a certified dealership to inquire about any recalls or technical service bulletins related to OBDII code P0116 and the Engine Coolant Temperature Sensor in specific GMC models.