P0118 2017 Chevrolet Silverado Code - Engine Coolant Temperature Circuit High Input
Quick Answer
The P0118 code for a 2017 Chevrolet Silverado indicates a problem with the Engine Coolant Temperature (ECT) Circuit High Input. Common causes include Faulty ECT Sensor: The ECT sensor itself may be malfunctioning, sending an incorrect high voltage signal to the ECM, Wiring Issues: Damaged or corroded wiring in the ECT circuit can cause electrical disruptions and lead to a high input signal, ECM Malfunction: A malfunction in the Engine Control Module can also cause communication errors with the 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
- P0118 2017 Chevrolet Silverado indicates Engine Coolant Temperature Circuit High Input.
- Common causes
- Common causes include Faulty ECT Sensor: The ECT sensor itself may be malfunctioning, sending an incorrect high voltage signal to the ECM, Wiring Issues: Damaged or corroded wiring in the ECT circuit can cause electrical disruptions and lead to a high input signal, ECM Malfunction: A malfunction in the Engine Control Module can also cause communication errors with the 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0118 2017 Chevrolet Silverado Description
The P0118 code for a 2017 Chevrolet Silverado indicates a problem with the Engine Coolant Temperature (ECT) Circuit High Input. This means that the Engine Control Module (ECM) has detected a higher than normal voltage signal from the ECT sensor. The ECT sensor is responsible for monitoring the temperature of the engine coolant and sending this information to the ECM to help regulate fuel delivery and ignition timing.
Common Causes of P0118 2017 Chevrolet Silverado
- Faulty ECT Sensor: The ECT sensor itself may be malfunctioning, sending an incorrect high voltage signal to the ECM.
- Wiring Issues: Damaged or corroded wiring in the ECT circuit can cause electrical disruptions and lead to a high input signal.
- ECM Malfunction: A malfunction in the Engine Control Module can also cause communication errors with the ECT sensor.
- Coolant Leaks: Low coolant levels or coolant leaks can affect the ECT sensor's readings and trigger the P0118 code.
Symptoms of P0118 2017 Chevrolet Silverado
- Check Engine Light: The most common symptom associated with the P0118 code is the illumination of the check engine light on the dashboard.
- Engine Overheating: A high input signal from the ECT sensor can cause the engine to run hotter than normal, leading to potential overheating.
- Poor Fuel Economy: Incorrect fuel mixture adjustments by the ECM can result in decreased fuel efficiency.
- Rough Idling: The engine may experience rough idling or even stalling due to the incorrect temperature readings.
How to Fix P0118 2017 Chevrolet Silverado
- Diagnostic Check: Begin by performing a diagnostic check to confirm the P0118 code and identify the specific cause of the high input signal.
- ECT Sensor Replacement: If the ECT sensor is faulty, replace it with a new one to ensure accurate temperature readings.
- Check Wiring: Inspect the wiring in the ECT circuit for any damage or corrosion, and repair or replace as needed.
- ECM Testing: Test the Engine Control Module for any malfunctions and replace if necessary to restore proper communication with the ECT sensor.
- Coolant System Inspection: Check for any coolant leaks or low levels that may be affecting the ECT sensor readings and address them accordingly.
Cost to Fix P0118 2017 Chevrolet Silverado
The cost of repairing the P0118 code on a 2017 Chevrolet Silverado can vary depending on the specific cause of the issue. On average, the cost of replacing the ECT sensor can range from $50 to $150, while diagnosing and repairing wiring issues may cost between $100 and $300. If the ECM needs to be replaced, the cost can be higher, ranging from $300 to $800 or more. Labor costs at auto repair shops typically range between $80 and $150 per hour, but rates can vary based on location and other factors. It's recommended to consult with a professional mechanic for an accurate cost estimate based on your specific situation.
Need more information about the P0118 2017 Chevrolet Silverado code?
Need more information on how to fix the P0118 2017 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0118 2017 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0118 2017 Chevrolet Silverado Code
No Frequently Asked Questions about P0118 2017 Chevrolet Silverado Code found.
Discuss the causes and fixes for P0118 2017 Chevrolet Silverado OBDII Code
Code P0118 2017 Chevrolet Silverado 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.