AutoCodes – GMC – P00F6 2018 GMC Sierra

P00F6 2018 GMC Sierra Code - Intake Air Humidity Sensor Circuit Erratic

Quick Answer

The Intake Air Humidity Sensor measures the ambient humidity of the air in the sensor bore. Common causes include Faulty Intake Air Humidity Sensor, Intake Air Humidity Sensor harness is open or shorted, Intake Air Humidity Sensor circuit poor electrical connection. 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
P00F6 2018 GMC Sierra indicates Intake Air Humidity Sensor Circuit Erratic.
Common causes
Common causes include Faulty Intake Air Humidity Sensor, Intake Air Humidity Sensor harness is open or shorted, Intake Air Humidity Sensor circuit poor electrical connection.
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 211
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 17, 2022
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Code P00F6 2018 GMC Sierra Description

The Intake Air Humidity Sensor measures the ambient humidity of the air in the sensor bore. The signal varies with intake air humidity and is displayed by the scan tool as duty cycle %. The Engine Control Module (ECM) applies 5 V to the circuit. The signal circuit is shared by the humidity sensor and the Intake Air Temperature (IAT) sensor 2. Ignition voltage and ground circuits are also supplied to the multifunction intake air sensor's internal circuits for these sensors: IAT sensor 2, Humidity sensor, and MAF sensor. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the humidity sensor signal is intermittent or has abruptly changed over a period of time greater than 5 s.
OBDII Code P00F6 2018 GMC Sierra - Intake Air Humidity Sensor Circuit Erratic - AutoCodes.com
P00F6 2018 GMC Sierra Code - Intake Air Humidity Sensor Circuit Erratic

What are the Possible Causes of the DTC P00F6 2018 GMC Sierra?

  • Faulty Intake Air Humidity Sensor
  • Intake Air Humidity Sensor harness is open or shorted
  • Intake Air Humidity Sensor circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P00F6 2018 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P00F6 2018 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 P00F6 2018 GMC Sierra code?

Need more information on how to fix the P00F6 2018 GMC Sierra code? Get Access to Factory Service Manuals

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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 P00F6 2018 GMC Sierra Code

What does the OBD-II code P00F6 mean on a 2018 GMC Sierra?

The P00F6 code indicates an "Intake Air Humidity Sensor Circuit Erratic," meaning the sensor is sending irregular or inconsistent readings to the engine control module (ECM).

What are the common symptoms of the P00F6 code on a 2018 GMC Sierra?

Symptoms may include poor engine performance, reduced fuel efficiency, rough idling, or the check engine light illuminating.

What causes the P00F6 code to appear?

Common causes include a faulty intake air humidity sensor, damaged wiring or connectors, corrosion in the sensor circuit, or a malfunctioning ECM.

Can a dirty air filter trigger the P00F6 code?

While a dirty air filter won't directly trigger the code, it can contribute to airflow issues that may amplify sensor-related problems.

How do I troubleshoot the P00F6 code?

Inspect the intake air humidity sensor and its wiring for damage, check for corrosion on the connectors, and use a scan tool to monitor sensor readings for irregularities.

Can I drive with the P00F6 code?

Driving with the P00F6 code is possible, but it may lead to reduced performance and fuel efficiency. Prompt diagnosis and repair are recommended to avoid further issues.

How much does it cost to fix the P00F6 code?

Repair costs vary but may range from $100 to $300, depending on whether the sensor, wiring, or another component needs replacement.

Is the intake air humidity sensor the same as the mass air flow sensor?

No, the intake air humidity sensor measures the moisture content in the air, while the mass air flow sensor measures the quantity of air entering the engine.

Can I reset the P00F6 code without fixing the issue?

You can clear the code with a scan tool, but if the underlying issue isn't addressed, the code will likely return.

How do I prevent the P00F6 code from recurring?

Regularly inspect and maintain the intake air system, ensure connectors are clean and secure, and replace faulty sensors promptly.

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