P111E 2014 GMC Sierra Code - Engine Coolant Temperature Sensor Not Plausible
Quick Answer
The Engine Coolant Temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. Common causes include Faulty Engine Coolant Temperature (ECT) Sensor, Engine Coolant Temperature Sensor harness is open or shorted, Engine Coolant Temperature Sensor 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
- P111E 2014 GMC Sierra indicates Engine Coolant Temperature Sensor Not Plausible.
- Common causes
- Common causes include Faulty Engine Coolant Temperature (ECT) Sensor, Engine Coolant Temperature Sensor harness is open or shorted, Engine Coolant Temperature Sensor 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.
Code P111E 2014 GMC Sierra Description
The purpose of this diagnostic is to determine if the input from the ECT sensor is skewed warmer or colder than the Intake Air Temperature (IAT) sensor and Radiator Coolant Temperature (RCT) sensor. The internal clock of the ECM will record the amount of time the engine is OFF. If the required engine OFF time is met at start-up, the ECM will compare temperatures between the ECT, IAT, and RCT sensors.
If the ECM detects that the temperature difference between the ECT, IAT, and RCT sensors is not within an acceptable operating range, the ECM will continue to run this diagnostic to determine if a block heater was active during the engine OFF time. The Diagnostic Trouble Code (DTC) will be set if the ECM detects that there is a temperature difference between the start-up Engine Coolant Temperature sensor, Intake Air Temperature sensor, and the Radiator Coolant Temperature (RCT) sensor.
What are the Possible Causes of the DTC P111E 2014 GMC Sierra?
- Faulty Engine Coolant Temperature (ECT) Sensor
- Engine Coolant Temperature Sensor harness is open or shorted
- Engine Coolant Temperature Sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P111E 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 P111E 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.
Need more information about the P111E 2014 GMC Sierra code?
Need more information on how to fix the P111E 2014 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P111E 2014 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P111E 2014 GMC Sierra Code
1. What does the OBDII code P111E mean on a 2014 GMC Sierra?
The P111E code indicates an "Engine Coolant Temperature Sensor Not Plausible," meaning the sensor is providing data that doesn't match expected values.
2. What are the common symptoms of the P111E code?
Symptoms may include the check engine light turning on, poor engine performance, incorrect temperature readings, or the engine running too hot or cold.
3. What causes the P111E code to appear on a GMC Sierra?
Common causes include a faulty engine coolant temperature sensor, wiring issues, a bad thermostat, or a problem with the engine control module (ECM).
4. Can I drive my 2014 GMC Sierra with the P111E code?
Driving with this code is not recommended, as it can lead to overheating, poor fuel efficiency, and potential engine damage.
5. How do I diagnose the P111E code on my GMC Sierra?
Use an OBDII scanner to confirm the code, inspect the engine coolant temperature sensor and its wiring for damage, and verify the thermostat's function.
6. How do I fix the P111E code on a 2014 GMC Sierra?
Repairs often include replacing the coolant temperature sensor, fixing damaged wiring, or replacing a stuck thermostat. In rare cases, the ECM may need reprogramming or replacement.
7. How much does it cost to fix the P111E code on a GMC Sierra?
Costs vary, but replacing the coolant temperature sensor typically ranges from $100 to $300, depending on labor and parts.
8. Can a bad thermostat trigger the P111E code?
Yes, a thermostat stuck open or closed can cause temperature readings that the ECM finds implausible, triggering this code.
9. How does the coolant temperature sensor affect engine performance?
The sensor provides data to the ECM to manage fuel injection and engine timing. Incorrect readings can lead to poor performance and inefficiency.
10. Will clearing the P111E code with a scanner fix the problem?
Clearing the code may temporarily turn off the check engine light, but the underlying issue must be repaired to prevent the code from returning.
Discuss the causes and fixes for P111E 2014 GMC Sierra OBDII Code
Code P111E 2014 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
