P0118 2014 Chevrolet Silverado Code - Engine Coolant Temperature Circuit High Input
Quick Answer
The Engine Coolant Temperature (ECT) sensor is a variable resistor that measures the temperature of the engine coolant. Common causes include Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (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 Low engine coolant level, Leaking or stuck open thermostat, Faulty Engine Coolant Temperature (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.
Code P0118 2014 Chevrolet Silverado Description
The ECM uses this high side coolant rationality diagnostic to determine if the input from the ECT sensor is skewed warmer than normal. The internal clock of the ECM will record the amount of time the ignition is OFF. If the calibrated ignition OFF time is met at start-up, the ECM will compare the temperature difference between the ECT and the intake air temperature (IAT) to determine if the temperatures are within an acceptable operating range of each other. The Diagnostic Trouble Code (DTC) will be set when the ECM detects a the ECT is colder than -39°C (-38°F) for greater than 5 s.
What are the Possible Causes of the DTC P0118 2014 Chevrolet Silverado?
- Low engine coolant level
- Leaking or stuck open thermostat
- Faulty Engine Coolant Temperature (ECT) sensor
- Engine Coolant Temperature sensor harness is open or shorted
- Engine Coolant Temperature sensor electrical circuit poor connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0118 2014 Chevrolet Silverado?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0118 2014 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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.
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