P1117 GMC Code - Engine Coolant Temperature Signal Out-Of-Range Low
Quick Answer
The P1117 GMC code indicates that the engine coolant temperature signal is out-of-range low. Common causes include Faulty Engine Coolant Temperature Sensor: The sensor may be damaged or worn out, leading to inaccurate temperature readings, Wiring Issues: A short or open circuit in the coolant temperature sensor wiring can cause signal irregularities, Malfunctioning ECM: If the ECM is not receiving accurate data from the coolant temperature sensor, it may trigger this code. 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
- P1117 GMC indicates Engine Coolant Temperature Signal Out-Of-Range Low.
- Common causes
- Common causes include Faulty Engine Coolant Temperature Sensor: The sensor may be damaged or worn out, leading to inaccurate temperature readings, Wiring Issues: A short or open circuit in the coolant temperature sensor wiring can cause signal irregularities, Malfunctioning ECM: If the ECM is not receiving accurate data from the coolant temperature sensor, it may trigger this code.
- 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 P1117 GMC Description
The P1117 GMC code indicates that the engine coolant temperature signal is out-of-range low. This means that the signal being sent by the engine coolant temperature sensor to the engine control module (ECM) is lower than the expected range. The engine coolant temperature sensor is a crucial component that monitors the temperature of the coolant in the engine. The ECM uses this information to adjust fuel delivery and ignition timing to ensure optimal performance and fuel efficiency.
Common Causes of P1117 GMC
- Faulty Engine Coolant Temperature Sensor: The sensor may be damaged or worn out, leading to inaccurate temperature readings.
- Wiring Issues: A short or open circuit in the coolant temperature sensor wiring can cause signal irregularities.
- Malfunctioning ECM: If the ECM is not receiving accurate data from the coolant temperature sensor, it may trigger this code.
- Coolant Contamination: Contaminated coolant can affect the sensor's readings and trigger the code.
Symptoms of P1117 GMC
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
- Poor Fuel Economy: A malfunctioning engine coolant temperature sensor can lead to incorrect fuel delivery, resulting in poor fuel economy.
- Rough Idling: The engine may idle roughly or inconsistently due to inaccurate coolant temperature readings.
- Engine Overheating: If the coolant temperature sensor is not functioning properly, the engine may overheat due to insufficient coolant flow.
How to Fix P1117 GMC
- Diagnose the Issue: Use a scan tool to read the code and perform a thorough inspection of the engine coolant temperature sensor and related components.
- Replace the Coolant Temperature Sensor: If the sensor is faulty, replace it with a new one to ensure accurate temperature readings.
- Check Wiring and Connections: Inspect the wiring harness and connectors for any damage or corrosion, and repair or replace as needed.
- Reset the ECM: Clear the code from the ECM's memory and reset the system to see if the issue persists.
- Test Drive: After repairs have been made, test drive the vehicle to ensure that the issue has been resolved and the code does not reappear.
Cost to Fix P1117 GMC
The typical repair costs for addressing a P1117 GMC code can range from $100 to $300, depending on the cause of the issue and the labor rates at the auto repair shop. Parts such as a new coolant temperature sensor may cost between $50 and $150, while labor costs can vary between $50 and $150 per hour. It's important to note that specific diagnosis time and labor rates can vary based on factors such as location, vehicle make and model, and engine type. It is recommended to obtain a detailed estimate from a reputable auto repair shop to determine the exact cost for resolving this issue.
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