AutoCodes – Generic – P00F5

P00F5 Code - Intake Air Humidity Sensor Circuit High 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: P00F5 indicates Intake Air Humidity Sensor Circuit High 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 12,111

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 May 17, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P00F5 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 greater than or equal to 95 % for greater than 5 s.

OBDII Code P00F5 - Intake Air Humidity Sensor Circuit High Voltage - AutoCodes.com — P00F5 Code - Intake Air Humidity Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P00F5?

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 P00F5?

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 does this mean?

Code Tech Notes

The Intake Air Humidity Sensor is part of the Mass Air Flow Sensor, Humidity Sensor, BARO Sensor, and Intake Air Temperature 1 and 2 Sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P00F5 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 P00F5 code?

Need more information on how to fix the P00F5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P00F5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P00F5 Buick — Intake Air Humidity Sensor Circuit High Voltage
P00F5 Cadillac — Intake Air Humidity Sensor Circuit High Voltage
P00F5 Chevrolet — Intake Air Humidity Sensor Circuit High Voltage
P00F5 GMC — Intake Air Humidity Sensor Circuit High Voltage

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 P00F5 Code

1. What are the common symptoms of OBDII code P00F5 (Intake Air Humidity Sensor Circuit High Voltage)?

- Common symptoms include poor engine performance, reduced fuel efficiency, and potential stalling or rough idling.

2. What could cause the OBDII code P00F5 to trigger?

- The code P00F5 is typically triggered by a faulty intake air humidity sensor or issues with the sensor circuit, such as a short or high voltage reading.

3. How can I diagnose the cause of OBDII code P00F5?

- To diagnose the issue, you can use a scan tool to read the code and then test the intake air humidity sensor, check for wiring issues, and inspect the sensor circuit for faults.

4. Can a dirty air filter trigger the OBDII code P00F5?

- Yes, a dirty air filter can potentially affect the intake air humidity sensor readings, leading to the triggering of code P00F5. It is recommended to check and replace the air filter if necessary.

5. Is it safe to continue driving with OBDII code P00F5 present?

- It is not recommended to drive with the code P00F5 active, as it can affect engine performance and fuel efficiency. It is best to address the issue promptly to prevent further damage.

6. How can I reset OBDII code P00F5 after making repairs?

- After fixing the underlying issue causing code P00F5, you can reset the code using an OBDII scan tool or by disconnecting the vehicle's battery for a few minutes.

7. Are there any DIY repair tips for fixing OBDII code P00F5?

- DIY repair tips include checking and cleaning the sensor connections, inspecting the sensor wiring for damage, and replacing the intake air humidity sensor if necessary.

8. Can extreme weather conditions impact the intake air humidity sensor readings?

- Yes, extreme weather conditions such as high humidity levels can potentially affect the intake air humidity sensor readings and trigger code P00F5.

9. Will OBDII code P00F5 cause my vehicle to fail an emissions test?

- Yes, if code P00F5 is present during an emissions test, it can cause your vehicle to fail. It is important to address the issue and clear the code before undergoing emissions testing.

10. How much does it typically cost to repair OBDII code P00F5 at a mechanic or dealership?

- The cost of repairing OBDII code P00F5 can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor at a mechanic or dealership.