AutoCodes – Ford – P1504 2009 Ford Fusion

P1504 2009 Ford Fusion Code - Intake Air Control Circuit Malfunction

Quick Answer

The Idle Air Control Valve (IACV) valve assembly controls the engine idle speed and provides a dashpot function. Common causes include Faulty Idle Air Control Valve, Idle Air Control Valve harness is open or shorted, Idle Air Control Valve 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: P1504 2009 Ford Fusion indicates Intake Air Control Circuit Malfunction.
Common causes: Common causes include Faulty Idle Air Control Valve, Idle Air Control Valve harness is open or shorted, Idle Air Control Valve 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 4,135

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 Aug 25, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1504 2009 Ford Fusion Description

The Idle Air Control Valve (IACV) valve assembly controls the engine idle speed and provides a dashpot function. The IAC valve assembly meters intake air around the throttle plate through a bypass within the IAC valve assembly and throttle body. The Powertrain Control Module (PCM) determines the desired idle speed or bypass air and signals the IAC valve assembly through a specified duty cycle. The IAC valve responds by positioning the IAC valve to control the amount of bypassed air. The PCM monitors engine RPM and increases or decreases the IAC duty cycle in order to achieve the desired RPM.

OBDII Code P1504 2009 Ford Fusion - Intake Air Control Circuit Malfunction - AutoCodes.com — P1504 2009 Ford Fusion Code - Intake Air Control Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P1504 2009 Ford Fusion?

Faulty Idle Air Control Valve
Idle Air Control Valve harness is open or shorted
Idle Air Control Valve circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1504 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1504 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.

Need more information about the P1504 2009 Ford Fusion 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 P1504 2009 Ford Fusion Code

1. What are the common symptoms of OBDII code P1504 in a 2009 Ford Fusion?

- Common symptoms include rough idling, engine stalling, decreased fuel efficiency, and difficulty starting the vehicle.

2. What causes the Intake Air Control Circuit Malfunction in a 2009 Ford Fusion?

- The P1504 code is typically triggered by a faulty intake air control actuator, damaged wiring, or a vacuum leak in the intake system.

3. How can I diagnose the Intake Air Control Circuit Malfunction in my 2009 Ford Fusion?

- You can diagnose the issue by checking the intake air control actuator for proper operation, inspecting the wiring for any damage, and performing a vacuum leak test.

4. Can a dirty air filter cause the P1504 code in a 2009 Ford Fusion?

- While a dirty air filter may not directly cause the P1504 code, it can contribute to poor engine performance and potentially trigger the malfunction.

5. How can I reset the OBDII code P1504 in my 2009 Ford Fusion?

- You can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes. However, the underlying issue must be addressed to prevent the code from reoccurring.

6. Is it safe to continue driving my 2009 Ford Fusion with the P1504 code present?

- It is not recommended to drive the vehicle with the P1504 code active, as it can lead to further engine damage and potential safety hazards. It's best to address the issue promptly.

7. Can I repair the Intake Air Control Circuit Malfunction in my 2009 Ford Fusion myself?

- Depending on your mechanical skills, you may be able to repair the issue yourself by replacing the intake air control actuator, repairing damaged wiring, or fixing any vacuum leaks. Otherwise, seek professional help.

8. Will the P1504 code affect the emissions of my 2009 Ford Fusion?

- Yes, the P1504 code can affect the emissions output of your vehicle, potentially causing it to fail emissions tests. It's important to address the issue to ensure the vehicle meets emissions standards.

9. How much does it typically cost to repair the Intake Air Control Circuit Malfunction in a 2009 Ford Fusion?

- The cost of repairing the P1504 code can vary depending on the specific cause of the issue, but it generally ranges from $100 to $300 for parts and labor.

10. Can a faulty oxygen sensor trigger the OBDII code P1504 in a 2009 Ford Fusion?

- While a faulty oxygen sensor is not a common cause of the P1504 code, it is still recommended to ensure that all engine sensors are functioning properly to prevent potential issues.