AutoCodes – GMC – P00F4 2016 GMC Sierra

P00F4 2016 GMC Sierra Code - Intake Air Humidity Sensor Circuit Low Voltage

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
P00F4 2016 GMC Sierra indicates Intake Air Humidity Sensor Circuit Low Voltage.
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 299
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 P00F4 2016 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 less than or equal to 5 % for greater than 5 s.
OBDII Code P00F4 2016 GMC Sierra - Intake Air Humidity Sensor Circuit Low Voltage - AutoCodes.com
P00F4 2016 GMC Sierra Code - Intake Air Humidity Sensor Circuit Low Voltage

What are the Possible Causes of the DTC P00F4 2016 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 P00F4 2016 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 P00F4 2016 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 P00F4 2016 GMC Sierra code?

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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 P00F4 2016 GMC Sierra Code

1. What does the OBDII code P00F4 mean on a 2016 GMC Sierra?

The P00F4 code indicates an issue with the Intake Air Humidity Sensor Circuit, specifically that it is experiencing low voltage.

2. What are the common symptoms of code P00F4?

Symptoms may include reduced engine performance, poor fuel economy, difficulty starting, and the check engine light being illuminated.

3. What causes the P00F4 code on a 2016 GMC Sierra?

Common causes include a faulty intake air humidity sensor, damaged or corroded wiring, a poor electrical connection, or a malfunctioning PCM (Powertrain Control Module).

4. Can I keep driving with the P00F4 code active?

While the vehicle may still be drivable, ignoring the code can lead to reduced performance and potential damage to other components.

5. How do I diagnose the P00F4 code?

Start by checking the sensor's wiring and connectors for damage or corrosion, verify sensor voltage with a multimeter, and use a scan tool to monitor sensor data.

6. How do I fix the P00F4 code on my GMC Sierra?

Repairs may involve replacing the intake air humidity sensor, repairing damaged wiring, or cleaning corroded connectors.

7. How much does it cost to fix the P00F4 code?

The cost varies but typically ranges from $100 to $300 for parts and labor, depending on whether the sensor or wiring needs replacing.

8. Can a dirty air filter cause the P00F4 code?

A dirty air filter is unlikely to directly cause this code, but it can impact airflow, which may exacerbate sensor issues.

9. Does the P00F4 code affect emissions?

Yes, a malfunctioning intake air humidity sensor can affect air-fuel mixture calculations, leading to higher emissions.

10. Do I need to reset the check engine light after fixing the P00F4 code?

Yes, after completing repairs, use an OBDII scanner to clear the code and reset the check engine light. Monitor to ensure the code does not return.

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