P0116 2014 GMC Sierra 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 2014 GMC Sierra 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.
Code P0116 2014 GMC Sierra Description
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.
What are the Possible Causes of the DTC P0116 2014 GMC Sierra?
- 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 2014 GMC Sierra?
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 2014 GMC Sierra 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.
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Frequently Asked Questions about P0116 2014 GMC Sierra Code
1. What does the OBDII code P0116 mean on a 2014 GMC Sierra?
P0116 indicates an issue with the Engine Coolant Temperature (ECT) sensor, specifically a performance problem where the sensor’s readings are inconsistent or outside the expected range.
2. What are the symptoms of a P0116 code on a 2014 GMC Sierra?
Common symptoms include poor fuel economy, difficulty starting, erratic temperature gauge readings, overheating, or the engine running rich or lean.
3. What causes the P0116 code on a 2014 GMC Sierra?
Common causes include a faulty ECT sensor, a stuck thermostat, low coolant levels, corroded or damaged wiring, or a malfunctioning PCM.
4. Can I drive my 2014 GMC Sierra with a P0116 code?
Driving with a P0116 code is not recommended, as it can lead to engine overheating or poor performance, potentially causing more severe damage.
5. How do I fix the P0116 code on a 2014 GMC Sierra?
Repairs may include replacing the ECT sensor, checking and repairing wiring or connectors, testing and replacing the thermostat, or refilling the coolant to proper levels.
6. How can I test the ECT sensor on my 2014 GMC Sierra?
You can use a multimeter to check the sensor’s resistance at different temperatures, comparing the readings to the manufacturer’s specifications.
7. Will replacing the thermostat fix the P0116 code on a 2014 GMC Sierra?
If the thermostat is stuck open or closed, replacing it may resolve the issue. However, it’s essential to diagnose other potential causes like the ECT sensor or wiring.
8. Can low coolant trigger the P0116 code on a 2014 GMC Sierra?
Yes, low coolant levels can affect the ECT sensor’s ability to measure temperature accurately, leading to a P0116 code.
9. How much does it cost to repair a P0116 code on a 2014 GMC Sierra?
Repair costs vary but typically range from $50 to $200 for replacing the ECT sensor or thermostat, plus labor costs if not done yourself.
10. Do I need to clear the code after fixing the P0116 issue on my 2014 GMC Sierra?
Yes, after repairs, you should use an OBDII scanner to clear the code and confirm that the issue is resolved.
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