AutoCodes – Ford – P0505 2008 Ford Fusion

P0505 2008 Ford Fusion Code - Idle Control System Malfunction

Quick Answer

The Powertrain Control Module (PCM) controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by operating the Electronic Throttle Actuator Control (TAC). Common causes include Intake air restriction, Vacuum leaks, Dirty Throttle Body. 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
P0505 2008 Ford Fusion indicates Idle Control System Malfunction.
Common causes
Common causes include Intake air restriction, Vacuum leaks, Dirty Throttle Body.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 3,963
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 02, 2020
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Code P0505 2008 Ford Fusion Description

The Powertrain Control Module (PCM) controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by operating the Electronic Throttle Actuator Control (TAC). The operating of the throttle valve is varied to allow for optimum control of the engine idling speed. The PCM calculates the actual engine speed from the signals of the crankshaft position sensor (POS) and the camshaft position sensor.
The PCM controls the Electronic Throttle Actuator Control so that the engine speed coincides with the target value memorized in the PCM. The target engine speed is the lowest speed at which the engine can operate steadily. The optimum value stored in the PCM is determined by taking into consideration various engine conditions, such as during warming up, deceleration, and engine load (air conditioner, power steering, and cooling fan operation, etc.).
The Diagnostic Trouble Code (DTC) sets when the desired RPM could not be reached or controlled during the key ON engine running (KOER) self-test.
OBDII Code P0505 2008 Ford Fusion - Idle Control System Malfunction - AutoCodes.com
P0505 2008 Ford Fusion Code - Idle Control System Malfunction

What are the Possible Causes of the DTC P0505 2008 Ford Fusion?

  • Intake air restriction
  • Vacuum leaks
  • Dirty Throttle Body
  • Faulty Electronic Throttle Actuator Control (TAC)
  • Electronic Throttle Actuator Control harness is open or shorted
  • Electronic Throttle Actuator Control circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0505 2008 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 P0505 2008 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 P0505 2008 Ford Fusion code?

Need more information on how to fix the P0505 2008 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the 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 P0505 2008 Ford Fusion Code

1. What is the OBDII code P0505 on a 2008 Ford Fusion?

The OBDII code P0505 for a 2008 Ford Fusion indicates an Idle Control System Malfunction.

2. What are common symptoms of a P0505 code in a 2008 Ford Fusion?

Common symptoms of a P0505 code in a 2008 Ford Fusion include high or erratic idle speed, stalling at idle, and potential engine hesitation.

3. What are the possible causes of a P0505 code in a 2008 Ford Fusion?

Potential causes of a P0505 code in a 2008 Ford Fusion include a faulty idle air control valve, vacuum leaks, dirty throttle body, or issues with the throttle position sensor.

4. How can I diagnose a P0505 code in my 2008 Ford Fusion?

Diagnosing a P0505 code in a 2008 Ford Fusion involves checking the idle air control valve, inspecting for vacuum leaks, cleaning the throttle body, and testing the throttle position sensor.

5. Can a P0505 code in a 2008 Ford Fusion cause other problems?

Yes, a P0505 code in a 2008 Ford Fusion can lead to poor engine performance, reduced fuel efficiency, and potential issues with the vehicle's emissions system.

6. How can I repair a P0505 code in my 2008 Ford Fusion?

Repairing a P0505 code in a 2008 Ford Fusion may involve replacing the idle air control valve, fixing any vacuum leaks, cleaning the throttle body, or addressing any throttle position sensor issues.

7. Is it safe to continue driving with a P0505 code in a 2008 Ford Fusion?

It is not recommended to drive for an extended period with a P0505 code in a 2008 Ford Fusion, as it can potentially lead to further engine problems and decreased performance.

8. Can a DIY enthusiast fix a P0505 code in a 2008 Ford Fusion?

Depending on your skill level, a DIY enthusiast may be able to address a P0505 code in a 2008 Ford Fusion by following repair guides and using the necessary tools.

9. How much does it cost to repair a P0505 code in a 2008 Ford Fusion?

The cost to repair a P0505 code in a 2008 Ford Fusion can vary depending on the specific issue, but it may range from $100 to $500 for parts and labor.

10. Will resetting the OBDII code P0505 in a 2008 Ford Fusion make it go away permanently?

Resetting the OBDII code P0505 in a 2008 Ford Fusion may temporarily clear the code, but if the underlying issue is not resolved, the code is likely to reappear. It's important to diagnose and address the root cause of the problem for a permanent fix.

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