AutoCodes – GMC – P01F0 2017 GMC Sierra

P01F0 2017 GMC Sierra Code - Coolant Temperature Dropped Below Diagnostic Monitoring Temperature

Quick Answer

The Engine Coolant Temperature (ECT) Sensor is a 2-wire negative temperature coefficient thermistor. Common causes include Faulty Thermostat, Faulty Engine Coolant Temperature (ECT) Sensor, Engine Coolant Temperature Sensor harness is open or shorted. 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: P01F0 2017 GMC Sierra indicates Coolant Temperature Dropped Below Diagnostic Monitoring Temperature.
Common causes: Common causes include Faulty Thermostat, Faulty Engine Coolant Temperature (ECT) Sensor, Engine Coolant Temperature Sensor harness is open or shorted.
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 Popularity 182

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 09, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P01F0 2017 GMC Sierra Description

The Engine Coolant Temperature (ECT) Sensor is a 2-wire negative temperature coefficient thermistor. As the temperature of the fluid increases, the resistance of the sensor decreases, varying the voltage on the signal circuit. The Engine Control Module (ECM) uses this diagnostic to determine that the Engine Coolant Temperature (ECT) does not fall below a minimum calibrated temperature after the vehicle has reached normal operating condition. The Diagnostic Trouble Code (DTC) will be set if the Engine Coolant Temperature is less than 71°C (160°F) for greater than 30 s.

OBDII Code P01F0 2017 GMC Sierra - Coolant Temperature Dropped Below Diagnostic Monitoring Temperature - AutoCodes.com — P01F0 2017 GMC Sierra Code - Coolant Temperature Dropped Below Diagnostic Monitoring Temperature

What does this mean?

What are the Possible Causes of the DTC P01F0 2017 GMC Sierra?

Faulty Thermostat
Faulty Engine Coolant Temperature (ECT) Sensor
Engine Coolant Temperature Sensor harness is open or shorted
Engine Coolant Temperature Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P01F0 2017 GMC Sierra?

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 P01F0 2017 GMC Sierra 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.

Need more information about the P01F0 2017 GMC Sierra code?

Need more information on how to fix the P01F0 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P01F0 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P01F0 2017 GMC Sierra Code

What does the OBDII code P01F0 mean for a 2017 GMC Sierra?

P01F0 indicates that the engine coolant temperature has dropped below the diagnostic monitoring temperature, which can affect the engine's efficiency and emissions performance.

What are the common symptoms of the P01F0 code?

Symptoms may include poor fuel economy, the check engine light turning on, extended engine warm-up times, and reduced cabin heating performance.

What causes the P01F0 code to appear?

Common causes include a stuck-open thermostat, low coolant levels, a faulty coolant temperature sensor, or a cooling system leak.

Can a stuck-open thermostat trigger the P01F0 code?

Yes, a stuck-open thermostat can prevent the engine from reaching its normal operating temperature, leading to the P01F0 code.

How can I diagnose the P01F0 code on my 2017 GMC Sierra?

Start by checking the coolant level, inspecting for leaks, and verifying the operation of the thermostat and coolant temperature sensor using a diagnostic scanner.

Is it safe to drive my 2017 GMC Sierra with the P01F0 code?

While the vehicle may still be drivable, ignoring the code can lead to reduced efficiency and potential long-term damage to the engine or emissions system.

How do I fix the P01F0 code?

Repairs typically involve replacing a faulty thermostat, topping off or flushing the coolant, repairing leaks, or replacing a malfunctioning coolant temperature sensor.

Can cold weather cause the P01F0 code to appear?

Yes, extremely cold weather can cause the coolant temperature to drop below the diagnostic threshold, especially if the thermostat or cooling system is not functioning correctly.

How much does it cost to repair the P01F0 code?

Repair costs vary but generally range from $150 to $300 for a thermostat replacement, with higher costs for additional repairs like addressing leaks or sensor replacements.

Can a coolant leak cause the P01F0 code?

Yes, a coolant leak can lower the system's coolant level, preventing the engine from maintaining optimal operating temperature and triggering the P01F0 code.