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P111E 2016 Chevrolet Silverado Code - Engine Coolant Temperature Sensor Not Plausible

Quick Answer

The P111E diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected an inconsistency in the readings from the engine coolant temperature (ECT) sensor. Common causes include Faulty Engine Coolant Temperature Sensor: The most common cause, where the sensor fails to provide accurate readings, Wiring Issues: Damaged or corroded wiring or connectors leading to poor electrical connections, Coolant Leaks: Low coolant levels affecting the sensor's ability to measure temperature accurately. 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 2016 Chevrolet Silverado indicates Engine Coolant Temperature Sensor Not Plausible.
Common causes
Common causes include Faulty Engine Coolant Temperature Sensor: The most common cause, where the sensor fails to provide accurate readings, Wiring Issues: Damaged or corroded wiring or connectors leading to poor electrical connections, Coolant Leaks: Low coolant levels affecting the sensor's ability to measure temperature accurately.
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 Oct 17, 2024
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Code P111E 2016 Chevrolet Silverado Description

The P111E diagnostic trouble code (DTC) indicates that the Engine Control Module (ECM) has detected an inconsistency in the readings from the engine coolant temperature (ECT) sensor. This sensor is crucial for monitoring the temperature of the coolant circulating through the engine, which is vital for optimal engine performance and efficiency. When the ECM receives a reading from the ECT sensor that is outside of the expected range—either too high or too low—it triggers this code.

OBDII Code P111E 2016 Chevrolet Silverado - Engine Coolant Temperature Sensor Not Plausible
P111E 2016 Chevrolet Silverado Code - Engine Coolant Temperature Sensor Not Plausible

Common Causes of P111E 2016 Chevrolet Silverado

  1. Faulty Engine Coolant Temperature Sensor: The most common cause, where the sensor fails to provide accurate readings.
  2. Wiring Issues: Damaged or corroded wiring or connectors leading to poor electrical connections.
  3. Coolant Leaks: Low coolant levels affecting the sensor's ability to measure temperature accurately.
  4. Faulty Engine Control Module (ECM): A malfunctioning ECM may misinterpret the sensor's signals.
  5. Thermostat Malfunction: A stuck thermostat can cause abnormal engine temperatures, leading to erroneous sensor readings.

Symptoms of P111E 2016 Chevrolet Silverado

  1. Poor Fuel Economy: Increased fuel consumption due to incorrect air-fuel mixture adjustments.
  2. Engine Overheating: Potential overheating due to improper temperature readings affecting cooling system operation.
  3. Check Engine Light: The illumination of the check engine light on the dashboard.
  4. Rough Idle or Stalling: Unstable engine performance leading to rough idling or stalling, particularly during warm-up.
  5. Increased Emissions: Higher emissions levels due to improper fuel mixture adjustments.

How to Fix P111E 2016 Chevrolet Silverado

  1. Diagnostic Testing: Begin with a thorough diagnostic check using an OBD-II scanner to confirm the P111E code and check for any additional codes.
  2. Inspect Wiring and Connectors: Examine the wiring and connectors associated with the ECT sensor for signs of damage, corrosion, or loose connections.
  3. Replace the ECT Sensor: If the sensor is determined to be faulty, replace it with a new, OEM-quality part to ensure accurate readings.
  4. Check Coolant Levels: Inspect the coolant system for leaks and ensure that the coolant level is adequate.
  5. Test the ECM: If all other components are functioning correctly, use specialized equipment to test the ECM for proper operation and reprogram if necessary.

Cost to Fix P111E 2016 Chevrolet Silverado

The typical repair costs for addressing a P111E code can vary widely based on the specific issue and the labor rates in your area. On average, replacing an ECT sensor can cost between $100 and $300, including parts and labor. If wiring repairs or ECM diagnostics are needed, costs could increase to between $300 and $600 or more. Labor rates generally range from $80 to $150 per hour, depending on the location and type of repair shop. In metropolitan areas or at dealerships, rates may be higher, while independent shops may offer more competitive pricing. For a more precise estimate, it is advisable to check local rates and obtain quotes from several repair facilities.

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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 P111E 2016 Chevrolet Silverado Code

1. What does OBDII code P111E mean on a 2016 Chevrolet Silverado?

P111E indicates an issue where the engine coolant temperature sensor is reporting data that is not plausible or inconsistent with expected values.

2. What are the common symptoms of code P111E in a 2016 Chevrolet Silverado?

Symptoms may include an illuminated check engine light, poor fuel efficiency, engine overheating, or irregular engine performance.

3. What causes code P111E in a 2016 Chevrolet Silverado?

Common causes include a faulty engine coolant temperature (ECT) sensor, damaged wiring or connectors, a malfunctioning thermostat, or issues with the engine control module (ECM).

4. Can driving with code P111E damage my 2016 Chevrolet Silverado?

Yes, ignoring this code can lead to engine overheating or suboptimal performance, which may cause long-term engine damage.

5. How do I diagnose code P111E on my 2016 Chevrolet Silverado?

Start by checking the ECT sensor and its wiring for damage, test the thermostat for proper operation, and use a scan tool to monitor live sensor data.

6. How do I fix code P111E on a 2016 Chevrolet Silverado?

Repairs may include replacing the ECT sensor, repairing damaged wiring or connections, replacing a stuck thermostat, or reprogramming the ECM if needed.

7. How much does it cost to fix code P111E on a 2016 Chevrolet Silverado?

The repair cost depends on the root cause, ranging from $50 to $150 for an ECT sensor replacement, while thermostat repairs or ECM reprogramming could be higher.

8. Can a bad thermostat trigger code P111E on my 2016 Chevrolet Silverado?

Yes, a malfunctioning thermostat can cause inaccurate coolant temperature readings, leading to this code.

9. Is it safe to reset the check engine light for code P111E without fixing the issue?

Resetting the light without addressing the problem can temporarily clear the code but doesn't resolve the underlying issue, potentially leading to further engine damage.

10. How can I prevent code P111E from recurring on my 2016 Chevrolet Silverado?

Regular maintenance, inspecting the cooling system, and promptly addressing sensor or wiring issues can help prevent this code from reappearing.

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