AutoCodes – Ford – P0104 2009 Ford Fusion

P0104 2009 Ford Fusion Code - Mass or Volume Air Flow 'A' Circuit Intermittent

Quick Answer

The Mass Air Flow (MAF) sensor is placed in the stream of the intake air. Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks. 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: P0104 2009 Ford Fusion indicates Mass or Volume Air Flow 'A' Circuit Intermittent.
Common causes: Common causes include Dirty Air Filter, Dirty Mass Air Flow (MAF) Sensor, Intake air leaks.
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 2,814

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 19, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0104 2009 Ford Fusion Description

The Mass Air Flow (MAF) sensor is placed in the stream of the intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot film that is supplied with electric current from the Engine Control Module (ECM). The ECM controls the temperature of the hot film by a certain amount. The heat generated by the hot film is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore, the ECM must supply more electric current to maintain the temperature of the hot film as air flow increases. The ECM detects the air flow by means of this current change. The Diagnostic Trouble Code (DTC) will be set when the ECM detects an MAF Sensor signal that is outside the calibrated level.

OBDII Code P0104 2009 Ford Fusion - Mass or Volume Air Flow 'A' Circuit Intermittent - AutoCodes.com — P0104 2009 Ford Fusion Code - Mass or Volume Air Flow 'A' Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0104 2009 Ford Fusion?

Dirty Air Filter
Dirty Mass Air Flow (MAF) Sensor
Intake air leaks
Faulty Mass Air Flow Sensor
Mass Air Flow Sensor harness is open or shorted
Mass Air Flow Sensor circuit poor electrical connection

How to Fix the DTC P0104 2009 Ford Fusion?

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

Before replacing the Mass Air Flow (MAF) Sensor, try replacing the air filter and cleaning the Mass Air Flow Sensor with low compress air or Mass Air Flow Sensor Cleaner. Reset code and drive vehicle. If the code comes back, you must replace the Mass Air Flow Sensor to fix the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0104 2009 Ford Fusion 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.

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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 P0104 2009 Ford Fusion Code

1. What are the common symptoms of OBDII code P0104 on a 2009 Ford Fusion?

- Common symptoms include rough idling, stalling, poor acceleration, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What does the OBDII code P0104 'Mass or Volume Air Flow 'A' Circuit Intermittent' mean for a 2009 Ford Fusion?

- This code indicates a problem with the Mass Air Flow (MAF) sensor circuit, specifically intermittent electrical issues.

3. What are the possible causes of OBDII code P0104 on a 2009 Ford Fusion?

- Potential causes include a faulty MAF sensor, damaged wiring or connectors in the MAF circuit, a dirty or contaminated MAF sensor, or a vacuum leak.

4. How can I diagnose the cause of OBDII code P0104 on my 2009 Ford Fusion?

- Diagnosis typically involves visually inspecting the MAF sensor and its wiring, testing the sensor's voltage and resistance, checking for vacuum leaks, and scanning for any related trouble codes.

5. Can I drive my 2009 Ford Fusion with OBDII code P0104?

- It is not recommended to drive your vehicle with this code present, as it can lead to poor performance and potential damage to the engine over time.

6. How can I repair OBDII code P0104 on my 2009 Ford Fusion?

- Repair options include cleaning or replacing the MAF sensor, repairing any damaged wiring or connectors, fixing vacuum leaks, and clearing the trouble code with an OBDII scanner.

7. Will resetting the trouble codes make OBDII code P0104 go away permanently?

- Resetting the codes may temporarily turn off the Check Engine Light, but if the underlying issue causing P0104 is not addressed, the code is likely to return.

8. How much does it typically cost to fix OBDII code P0104 on a 2009 Ford Fusion?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $500, including parts and labor.

9. Is it possible to prevent OBDII code P0104 from occurring on my 2009 Ford Fusion?

- Regular maintenance, such as keeping the MAF sensor clean and checking for vacuum leaks, can help prevent this code from appearing.

10. Can a DIY enthusiast without much experience fix OBDII code P0104 on a 2009 Ford Fusion?

- While some simple tasks like cleaning the MAF sensor can be done by a DIY enthusiast, diagnosing and repairing complex electrical issues may require professional help.