AutoCodes – Ford – P0511 2008 Ford Fusion

P0511 2008 Ford Fusion Code - Idle Air Control Circuit

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 Dirty Throttle Body, Faulty Electronic Throttle Actuator Control (TAC), Electronic Throttle Actuator Control harness is open or shorted. 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
P0511 2008 Ford Fusion indicates Idle Air Control Circuit.
Common causes
Common causes include Dirty Throttle Body, Faulty Electronic Throttle Actuator Control (TAC), Electronic Throttle Actuator Control harness is open or shorted.
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 3,908
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 P0511 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) will set the Electronic Throttle Actuator Control (TAC) does not operate properly.
OBDII Code P0511 2008 Ford Fusion - Idle Air Control Circuit - AutoCodes.com
P0511 2008 Ford Fusion Code - Idle Air Control Circuit

What are the Possible Causes of the DTC P0511 2008 Ford Fusion?

  • 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 P0511 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 P0511 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 P0511 2008 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 P0511 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P0511 on a 2008 Ford Fusion?

- Common symptoms include rough idling, stalling, poor acceleration, and potential issues with the vehicle's overall performance.

2. What does the OBDII code P0511 indicate on a 2008 Ford Fusion?

- The code P0511 specifically points to a problem with the idle air control circuit in the vehicle.

3. What are the possible causes of OBDII code P0511 on a 2008 Ford Fusion?

- Potential causes of this code include a faulty idle air control valve, wiring or connector issues, vacuum leaks, or a malfunctioning PCM (powertrain control module).

4. How can I diagnose the cause of OBDII code P0511 on my 2008 Ford Fusion?

- Diagnostic steps may include checking the idle air control valve for proper operation, inspecting the wiring and connectors for damage, and testing for vacuum leaks in the intake system.

5. Can I drive my 2008 Ford Fusion with OBDII code P0511?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potentially unsafe driving conditions.

6. How can I repair OBDII code P0511 on a 2008 Ford Fusion?

- Repair options may include replacing the idle air control valve, repairing any damaged wiring or connectors, fixing vacuum leaks, or reprogramming the PCM if needed.

7. Is it safe to reset the OBDII code P0511 on my 2008 Ford Fusion with a diagnostic tool?

- While you can clear the code with a diagnostic tool, it is essential to address and repair the underlying issue causing the code to prevent future problems.

8. Are there any preventive maintenance tips to avoid OBDII code P0511 on a 2008 Ford Fusion?

- Regularly maintaining and servicing the idle air control system, checking for vacuum leaks, and ensuring proper engine performance can help prevent this code from appearing.

9. How much does it typically cost to repair OBDII code P0511 on a 2008 Ford Fusion?

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

10. Can a DIY enthusiast fix OBDII code P0511 on a 2008 Ford Fusion?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address this code by following repair guides or tutorials, but professional assistance is recommended for complex issues.

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