P0118 2014 GMC Sierra Code - Engine Coolant Temperature Circuit High Input
Quick Answer
The P0118 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Engine Coolant Temperature (ECT) sensor is reporting a high input. Common causes include Faulty ECT sensor, Wiring or connector issues in the ECT circuit, Low coolant levels. 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 2014 GMC Sierra indicates Engine Coolant Temperature Circuit High Input.
- Common causes
- Common causes include Faulty ECT sensor, Wiring or connector issues in the ECT circuit, Low coolant levels.
- 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.
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Code P0118 2014 GMC Sierra Description
The P0118 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates that the Engine Coolant Temperature (ECT) sensor is reporting a high input. The ECT sensor is responsible for monitoring the temperature of the engine coolant and sending this information to the engine control module (ECM). When the ECM receives a signal indicating that the coolant temperature is excessively high, it triggers the P0118 code. This can lead to various issues with engine performance, fuel efficiency, emissions, and overall vehicle operation.
Common Causes of P0118 2014 GMC Sierra
- Faulty ECT sensor
- Wiring or connector issues in the ECT circuit
- Low coolant levels
- Air pockets in the cooling system
- ECM software glitches
Symptoms of P0118 2014 GMC Sierra
- Engine overheating
- Inaccurate temperature gauge readings
- Poor fuel economy
- Rough idling or stalling
- Check Engine Light illuminated
How to Fix P0118 2014 GMC Sierra
- Begin by diagnosing the issue using a scan tool to confirm the P0118 code and check the ECT sensor's functionality.
- Inspect the wiring and connectors in the ECT circuit for any damage or loose connections.
- Test the ECT sensor resistance and compare it to the manufacturer's specifications to determine if it is faulty.
- Check the coolant level and bleed the cooling system to remove any air pockets that could affect temperature readings.
- If necessary, replace the ECT sensor, repair any wiring issues, and clear the DTC to reset the ECM.
Cost to Fix P0118 2014 GMC Sierra
The typical repair costs for resolving a P0118 code on a 2014 GMC Sierra can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary depending on various factors. It is advisable to consult with local auto repair shops to obtain a more accurate estimate based on your location and vehicle specifics.
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