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P0117 2018 Chevrolet Silverado Code - Engine Coolant Temperature Circuit Low Input

Quick Answer

The P0117 code for a 2018 Chevrolet Silverado indicates that there is a low input signal in the engine coolant temperature circuit. Common causes include Faulty engine coolant temperature sensor, Wiring issue in the coolant temperature circuit, Corroded connector. 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
P0117 2018 Chevrolet Silverado indicates Engine Coolant Temperature Circuit Low Input.
Common causes
Common causes include Faulty engine coolant temperature sensor, Wiring issue in the coolant temperature circuit, Corroded connector.
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 Sep 10, 2024
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Code P0117 2018 Chevrolet Silverado Description

The P0117 code for a 2018 Chevrolet Silverado indicates that there is a low input signal in the engine coolant temperature circuit. This means that the Engine Control Module (ECM) has detected that the coolant temperature sensor is sending a signal that is lower than the normal range. The engine coolant temperature sensor is responsible for monitoring the temperature of the engine coolant and providing this information to the ECM.

OBDII Code P0117 2018 Chevrolet Silverado - Engine Coolant Temperature Circuit Low Input
P0117 2018 Chevrolet Silverado Code - Engine Coolant Temperature Circuit Low Input

Common Causes of P0117 2018 Chevrolet Silverado

  1. Faulty engine coolant temperature sensor
  2. Wiring issue in the coolant temperature circuit
  3. Corroded connector
  4. ECM malfunction
  5. Low coolant level

Symptoms of P0117 2018 Chevrolet Silverado

  1. Poor fuel economy
  2. Rough idling
  3. Hesitation during acceleration
  4. Engine overheating
  5. Check Engine Light illuminated

How to Fix P0117 2018 Chevrolet Silverado

  1. Begin by checking the coolant level in the radiator and topping it off if necessary.
  2. Inspect the wiring and connectors in the coolant temperature circuit for any signs of damage or corrosion. Repair or replace as needed.
  3. Test the engine coolant temperature sensor using a multimeter to determine if it is functioning properly. Replace the sensor if it is faulty.
  4. Clear the diagnostic trouble codes from the ECM using a scan tool and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, consult a professional mechanic for further diagnosis and potential ECM replacement.

Cost to Fix P0117 2018 Chevrolet Silverado

The typical repair costs for addressing a P0117 code on a 2018 Chevrolet Silverado can range from $100 to $300. This estimate includes the cost of a new engine coolant temperature sensor, any necessary wiring repairs, and labor costs. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary significantly. It's recommended to check with local shops for a more accurate estimate based on your location and vehicle specifics.

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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 P0117 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0117 in a 2018 Chevrolet Silverado?

The common symptoms of code P0117 include engine overheating, poor fuel economy, rough idling, and a decrease in engine performance.

2. What does the OBDII code P0117 indicate in a 2018 Chevrolet Silverado?

Code P0117 indicates that the Engine Coolant Temperature (ECT) sensor is reporting a low input signal to the engine control module.

3. What are the potential causes of OBDII code P0117 in a 2018 Chevrolet Silverado?

The potential causes of code P0117 include a faulty ECT sensor, a corroded or damaged wiring harness, a malfunctioning thermostat, or low coolant levels.

4. How can I diagnose OBDII code P0117 in my 2018 Chevrolet Silverado?

To diagnose code P0117, you can use a scan tool to read the ECT sensor data, visually inspect the wiring harness and connector for any visible damage, and test the ECT sensor resistance with a multimeter.

5. Can I continue driving my 2018 Chevrolet Silverado with OBDII code P0117?

It is not recommended to drive your vehicle with code P0117 as it can lead to engine damage due to incorrect temperature readings and potential overheating issues.

6. How can I repair OBDII code P0117 in my 2018 Chevrolet Silverado?

To repair code P0117, you may need to replace the ECT sensor, repair or replace any damaged wiring, ensure proper coolant levels, and verify the correct operation of the thermostat.

7. Are there any DIY tips for fixing OBDII code P0117 in a 2018 Chevrolet Silverado?

DIY tips for fixing code P0117 include checking and cleaning the ECT sensor connector, ensuring proper coolant levels, and inspecting the wiring harness for any visible damage.

8. Will resetting the OBDII system clear the P0117 code in my 2018 Chevrolet Silverado?

Resetting the OBDII system may temporarily clear the P0117 code, but if the underlying issue is not addressed, the code is likely to reappear after driving the vehicle for some time.

9. How serious is OBDII code P0117 in a 2018 Chevrolet Silverado?

Code P0117 should be taken seriously as it can lead to engine overheating, poor fuel economy, and potential engine damage if not addressed promptly.

10. Can extreme weather conditions affect the occurrence of OBDII code P0117 in a 2018 Chevrolet Silverado?

Extreme weather conditions, such as very low or high temperatures, can affect the ECT sensor readings and potentially trigger code P0117 in a 2018 Chevrolet Silverado.

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