AutoCodes – Chevrolet – P00F4 2018 Chevrolet Silverado

P00F4 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 1,547
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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Intake Air Humidity Sensor Circuit Low Voltage - AutoCodes.com
P00F4 2018 Chevrolet Silverado Code - Intake Air Humidity Sensor Circuit Low Voltage

What are the Possible Causes of the DTC P00F4 2018 Chevrolet Silverado?

  • 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 2018 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P00F4 2018 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.

Need more information about the P00F4 2018 Chevrolet Silverado code?

Need more information on how to fix the P00F4 2018 Chevrolet Silverado 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 P00F4 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P00F4 on a 2018 Chevrolet Silverado?

- Common symptoms of this code may include reduced engine performance, rough idling, poor fuel efficiency, and the illumination of the check engine light.

2. What does the OBDII code P00F4 indicate in a 2018 Chevrolet Silverado?

- The P00F4 code specifically relates to the Intake Air Humidity Sensor Circuit registering low voltage in the intake air system of the vehicle.

3. What are the possible causes of the Intake Air Humidity Sensor Circuit low voltage issue in a 2018 Chevrolet Silverado?

- Possible causes may include a faulty intake air humidity sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

4. How can I diagnose the OBDII code P00F4 on my 2018 Chevrolet Silverado?

- Diagnosing this code typically involves using an OBDII scanner to retrieve the code, inspecting the intake air humidity sensor and its wiring for any visible damage, and testing the sensor's voltage output.

5. Can I continue driving my 2018 Chevrolet Silverado with the P00F4 code present?

- It is not recommended to drive the vehicle with the P00F4 code active, as it can lead to reduced engine performance and potential long-term damage if left unresolved.

6. How can I repair the Intake Air Humidity Sensor Circuit low voltage issue on my 2018 Chevrolet Silverado?

- Repair steps may include replacing the intake air humidity sensor, repairing any damaged wiring or connectors, or reprogramming the engine control module to rectify the voltage issue.

7. Is it possible to reset the check engine light after fixing the P00F4 code on a 2018 Chevrolet Silverado?

- Yes, after resolving the issue causing the P00F4 code, you can reset the check engine light using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes.

8. Are there any preventive maintenance tips to avoid encountering the P00F4 code in a 2018 Chevrolet Silverado?

- Regularly inspecting and cleaning the intake air humidity sensor, ensuring proper wiring connections, and addressing any engine performance issues promptly can help prevent the recurrence of this code.

9. How long does it typically take to repair the Intake Air Humidity Sensor Circuit low voltage issue on a 2018 Chevrolet Silverado?

- Repair times can vary depending on the exact cause of the issue, but it is advisable to allocate a few hours for diagnosis, parts replacement, and potential reprogramming of the ECM.

10. Can a DIY enthusiast with basic automotive knowledge fix the P00F4 code on a 2018 Chevrolet Silverado?

- While some DIY enthusiasts may be able to address simple causes like sensor replacement or wiring repairs, diagnosing and repairing complex issues related to the P00F4 code may require professional expertise and specialized tools.

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