P0118 2014 Chevrolet Silverado Code - Engine Coolant Temperature Circuit High Input
Quick Answer
The P0118 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates that there is a high input signal from the engine coolant temperature (ECT) sensor circuit. Common causes include Faulty ECT Sensor: The ECT sensor may be malfunctioning, providing incorrect temperature readings to the ECM, Wiring Issues: A short or open circuit in the ECT sensor wiring can disrupt the signal sent to the ECM, ECM Malfunction: A malfunctioning ECM may not be properly interpreting the signal from 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 2014 Chevrolet Silverado indicates Engine Coolant Temperature Circuit High Input.
- Common causes
- Common causes include Faulty ECT Sensor: The ECT sensor may be malfunctioning, providing incorrect temperature readings to the ECM, Wiring Issues: A short or open circuit in the ECT sensor wiring can disrupt the signal sent to the ECM, ECM Malfunction: A malfunctioning ECM may not be properly interpreting the signal from 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 2014 Chevrolet Silverado Description
The P0118 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates that there is a high input signal from the engine coolant temperature (ECT) sensor circuit. 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 detects a high input signal from the ECT sensor circuit, it means that the engine coolant temperature is higher than expected.
Common Causes of P0118 2014 Chevrolet Silverado
- Faulty ECT Sensor: The ECT sensor may be malfunctioning, providing incorrect temperature readings to the ECM.
- Wiring Issues: A short or open circuit in the ECT sensor wiring can disrupt the signal sent to the ECM.
- ECM Malfunction: A malfunctioning ECM may not be properly interpreting the signal from the ECT sensor.
- Cooling System Problems: Issues with the cooling system, such as a low coolant level or a malfunctioning thermostat, can cause the engine to run hot and trigger the P0118 code.
Symptoms of P0118 2014 Chevrolet Silverado
- Check Engine Light: The most common symptom associated with the P0118 code is the illumination of the check engine light on the vehicle's dashboard.
- Engine Overheating: Since the ECM is receiving a high input signal from the ECT sensor, the engine may run hotter than normal, potentially leading to overheating.
- Poor Fuel Efficiency: Incorrect temperature readings can cause the engine to run rich or lean, resulting in decreased fuel efficiency.
- Rough Idling: The engine may experience rough idling or stalling due to incorrect temperature data affecting fuel mixture and ignition timing.
- Reduced Performance: The vehicle may exhibit reduced performance, hesitation, or lack of power due to the ECM compensating for inaccurate temperature readings.
How to Fix P0118 2014 Chevrolet Silverado
- Diagnose the Issue: Use a scan tool to retrieve the DTC and perform a visual inspection of the ECT sensor and wiring to identify any obvious issues.
- Test ECT Sensor: Test the ECT sensor using a multimeter to check for proper resistance values and ensure it is functioning correctly.
- Check Wiring: Inspect the wiring harness for any signs of damage, corrosion, or loose connections that could be causing the high input signal.
- Replace ECT Sensor: If the ECT sensor is faulty, replace it with a new sensor and ensure proper installation.
- Clear DTC: Clear the DTC using a scan tool after completing the repair to reset the check engine light and monitor the system for any recurring issues.
Cost to Fix P0118 2014 Chevrolet Silverado
The typical repair costs for addressing a P0118 code on a 2014 Chevrolet Silverado can vary depending on the specific cause of the issue. In general, replacing a faulty ECT sensor can cost between $50 and $100 for the part, with additional labor costs ranging from $100 to $200. If wiring repairs or ECM replacement are necessary, the total repair costs could increase accordingly.
Need more information about the P0118 2014 Chevrolet Silverado code?
Need more information on how to fix the P0118 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0118 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0118 2014 Chevrolet Silverado Code
What does the OBDII code P0118 mean for a 2014 Chevrolet Silverado?
P0118 indicates a malfunction in the Engine Coolant Temperature (ECT) sensor circuit, specifically that the sensor is reading an abnormally high voltage.
What are the common symptoms of code P0118?
Common symptoms include erratic temperature gauge readings, poor fuel economy, difficulty starting the engine, and possibly the engine running rough.
What causes the P0118 code in a 2014 Chevrolet Silverado?
Causes may include a faulty ECT sensor, damaged wiring or connectors, a short in the circuit, or an issue with the ECM (Engine Control Module).
Can driving with code P0118 damage my Silverado?
Driving with this code may not immediately damage your vehicle, but ignoring it can lead to poor engine performance, reduced fuel efficiency, and potential overheating issues.
How do I fix code P0118 on my Silverado?
Repairs typically involve replacing the ECT sensor, repairing or replacing damaged wiring, and ensuring connectors are clean and properly attached.
Where is the Engine Coolant Temperature sensor located on the 2014 Silverado?
The ECT sensor is usually located near the thermostat housing or on the engine block where the coolant flows.
Will clearing the code fix the problem permanently?
No, clearing the code without addressing the underlying issue will only temporarily remove the code. The problem will likely return unless proper repairs are made.
How much does it cost to repair the P0118 code?
Repair costs vary but typically range from $100 to $300, depending on labor rates and whether parts like the ECT sensor or wiring need replacement.
Can a bad thermostat cause the P0118 code?
A bad thermostat itself won't cause P0118 directly, but it can lead to overheating or temperature fluctuations, which might impact the ECT sensor readings.
How can I test the ECT sensor to confirm it's faulty?
You can use a multimeter to check the sensor's resistance values at different temperatures. Compare the readings to the manufacturer's specifications to see if the sensor is functioning properly.
Discuss the causes and fixes for P0118 2014 Chevrolet Silverado OBDII Code
Code P0118 2014 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.