P0505 Ford 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 Ford 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.
Code P0505 Ford Description
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.
What are the Possible Causes of the DTC P0505 Ford?
- 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 Ford?
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.
Code Tech Notes
2005-2007 Ford Crown Victoria
2006 Ford Mustang
2004-2006 Ford
2005-2006 Ford E-350
2005-2006 Ford E-450
2005-2006 Ford F-Super Duty
2006-2007 Ford Explorer Sport Trac
2006-2007 Ford Explorer
Ford Factory Service Bulletin OBDII Code P0505
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0505 Ford 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 Ford code?
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Need Help with the Code?
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Information for Specific Ford Models
- P0505 1997 Ford F150 — Idle Air Control System Malfunction
- P0505 1998 Ford F150 — Idle Air Control System Malfunction
- P0505 1999 Ford F150 — Idle Air Control System Malfunction
- P0505 2000 Ford F150 — Idle Air Control System Malfunction
- P0505 2001 Ford F150 — Idle Air Control System Malfunction
- P0505 2002 Ford F150 — Idle Air Control System Malfunction
- P0505 2003 Ford F150 — Idle Air Control System Malfunction
- P0505 2006 Ford Fusion — Idle Control System Malfunction
- P0505 2007 Ford Fusion — Idle Control System Malfunction
- P0505 2008 Ford Fusion — Idle Control System Malfunction
- P0505 2009 Ford Fusion — Idle Control System Malfunction
- P0505 2010 Ford Fusion — Idle Control System Malfunction
- P0505 2011 Ford Fusion — Idle Control System Malfunction
- P0505 2012 Ford Fusion — Idle Control System Malfunction
Frequently Asked Questions about P0505 Ford Code
1. What are the common symptoms of OBDII code P0505 on a Ford vehicle?
- Common symptoms include erratic or high idle speed, stalling at idle, and potential difficulty starting the engine.
2. What causes the Idle Control System Malfunction (P0505) code on a Ford vehicle?
- The P0505 code is typically triggered by a faulty idle air control valve (IACV), vacuum leaks, or issues with the throttle body.
3. How can I diagnose the cause of the P0505 code on my Ford vehicle?
- Diagnosis involves checking the IACV for proper function, inspecting for vacuum leaks, and ensuring the throttle body is clean and functioning correctly.
4. Can a dirty throttle body cause the P0505 code on a Ford?
- Yes, a dirty or clogged throttle body can disrupt the airflow and cause the idle control system malfunction, triggering the P0505 code.
5. What are the repair options for fixing the P0505 code on a Ford?
- Repair options may include cleaning or replacing the idle air control valve, fixing any vacuum leaks, cleaning the throttle body, or resetting the engine control module.
6. Is it safe to continue driving with the P0505 code illuminated on a Ford vehicle?
- It is not recommended to drive with the P0505 code as it can affect the vehicle's performance and fuel efficiency. It is best to address the issue promptly.
7. Can resetting the OBDII code P0505 on a Ford vehicle make it go away permanently?
- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the P0505 code is not addressed, it is likely to reappear.
8. How long does it typically take to repair the Idle Control System Malfunction code (P0505) on a Ford?
- The repair time can vary depending on the specific cause of the issue. Simple fixes like cleaning the throttle body may take less than an hour, while replacing the IACV could take longer.
9. Are there any preventative maintenance steps to avoid encountering the P0505 code on a Ford?
- Performing regular maintenance, such as cleaning the throttle body and checking for vacuum leaks, can help prevent issues that may lead to the P0505 code.
10. Can a DIY enthusiast repair the P0505 code on a Ford, or is it best left to a professional mechanic?
- Depending on your skill level and access to tools, DIY enthusiasts can attempt to diagnose and repair the P0505 code, but if unsure, it is recommended to consult a professional mechanic for assistance.
1. What are the common symptoms of OBDII code P0505 in a Ford vehicle?
- Common symptoms include erratic idle speed, stalling at idle, and the vehicle's engine running too fast or too slow.
2. What is the main cause of OBDII code P0505 in a Ford vehicle?
- The main cause is usually a malfunction in the idle air control (IAC) valve or its circuit, which controls the engine's idle speed.
3. How can I diagnose the issue related to OBDII code P0505 in my Ford vehicle?
- You can use a scan tool to check for the code and then inspect the IAC valve and its wiring for any signs of damage or malfunction.
4. Can a dirty throttle body cause OBDII code P0505 in a Ford vehicle?
- Yes, a dirty throttle body can also contribute to the issue as it can affect the IAC valve's operation and cause idle control problems.
5. Are there any DIY repair tips for fixing OBDII code P0505 in a Ford vehicle?
- DIY repair tips include cleaning the throttle body, checking and cleaning the IAC valve, and ensuring all related wiring connections are secure.
6. Will driving with OBDII code P0505 in a Ford vehicle cause further damage?
- Driving with this code may lead to poor engine performance, reduced fuel efficiency, and potential stalling issues, but it should not cause immediate severe damage.
7. How much does it typically cost to repair OBDII code P0505 in a Ford vehicle?
- Repair costs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.
8. Can I clear the OBDII code P0505 in my Ford vehicle and see if it comes back?
- Yes, you can try clearing the code, but if the underlying issue is not addressed, it is likely to return after some driving cycles.
9. Is it safe to continue driving my Ford vehicle with OBDII code P0505?
- It is generally safe to drive but not recommended, as the issue can worsen over time and may lead to unexpected idle control problems.
10. How can a mechanic help me resolve OBDII code P0505 in my Ford vehicle?
- A mechanic can perform a thorough diagnosis, properly repair or replace the faulty components, and ensure the issue is fully resolved to prevent future occurrences.
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