Question about 1996 Acura TL Series

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P0505 idle control system malfunction

Anybody know how to repair this problem for a 1996 acura TL

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Take the Idle Air Control valve off the bottom of the Throttle Body and clean it. If that doesn't work you may need a new one. Please rate me if you find this helpful, thanks.

Posted on Jun 04, 2009

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1 Answer

My 1996 acura came up\with code 0725 what does this mean


P0700 - Transmission Control System malfunction;
P0725 - Engine Speed Input Circuit malfunction

Search internet for specific code to find the specific parts these codes represent on your vehicle. Also check repair manual for your specific vehicle model.

Jul 07, 2014 | 1996 Acura TL Series

1 Answer

96 acura idle rough an when I'm sitting still an turn the steering wheel the car dies please help.u can email @ kooncraig@yahoo.com thank u


a vacuum leak. cold fuel system is enriched. any extra load could cause it to die. what TL? 2.5? idle air control valve? TPS ? check for codes!!

Jun 04, 2014 | 1996 Acura TL Series

1 Answer

1996 acura 2.5 tl upon start up the engine goes to 2500-3000 rpms then the engine rpms start surging between 1500 to 2000 then after several minutes it goes to a normal idle and runs fine.


Hi, I had the same problem, and is now fixed. Replace your idle control valve, and the idle problem will go away, and your car will be PERFECT!

Aug 25, 2013 | 1996 Acura TL Series

1 Answer

2002 honda civic code p0505


Error Code: P0505
Fault Location:
Idle Speed Control (ISC) System - Malfunction
Possible Cause:
-Wiring harness.
-Idle speed control (ISC) actuator/Idle air control valve (IAC) valve.
-Throttle valve tight/sticking.
-Engine control module (ECM).

May 13, 2013 | Honda Civic Cars & Trucks

2 Answers

Actron trouble code PO505 99 acura


P0505 - IAC (Idle Air Control) System Malfunction

The IAC (Idle Air Control) valve controls the idle speed of the engine. At idle the throttle plate is closed, of course. The IAC is computer controlled and allows only a certain amount of air around the throttle plate. This metered air controls the idle speed. The IAC has a "plunger" or "shutter" that moves to open or close the bypass air passageway. The more air the IAC allows around the throttle plate, the higher the idle. The PCM (Powertrain Control Module) uses the IAC valve to keep the idle speed correct with varying engine demands. Can be a three or four wire sensor depending on the model.

The PCM monitors voltages of the IAC circuits and if it detects an incorrect voltage on one or more of the IAC motor circuits it will set P0505. NOTE: Problems with the IAC would only be noticeable at idle or when throttle is closed.

Symptoms may include:
* MIL (Malfunction Indicator Lamp) illumination
* Engine stalls and may not idle unless throttle is depressed
* Intermittently stalls when letting off the throttle
* Engine may idle too high


Potential causes of an P0505 code include:
* IAC motor connector is damaged (check connector and pins for damage, and moisture)
* One or more IAC circuits open or shorted to ground
* One or more IAC circuits are shorted to voltage
* IAC has failed
* PCM has failed


Possible Solutions:
This should be a fairly straightforward diagnosis. Start by clearing the fault codes. Then unplug the IAC and start the engine (This may cause other IAC codes to set. Just ignore them for now). If the P0505 code doesn't reset, replace the IAC. It is internally shorting one of the IAC circuits. If the code DOES return after unplugging the IAC and starting the engine, then you know it isn't the IAC motor. Visually check the wiring harness all the way back to the PCM. You may need to visually inspect the harness by removing all the insulation off the wires. It is possible that the wires could be shorting to eachother or to other wires in the harness.

If there are no wiring problems, and the code keeps returning with the IAC unplugged, you can check the PCM by removing the IAC wires from the PCM connector (or clipping the wires in a location where they can be repaired easily) and then start the engine (If you're not sure, don't do it. Take it to a qualified professional). Now if the code doesn't reset there is a problem with the wiring. Check for continuity on all the IAC wires. Any resistance points to a problem. Check for voltage on any(At this point there shouldn't be any voltages on the wires because they're clipped at one end and unplugged at the IAC). Repair as necessary. But if the P0505 code DOES reset after removing the IAC wires from the PCM connector(or clipping them), replace the PCM, there's a problem internally on the IAC control circuit.

Hope this helps (remember to rate and commene this).

Jan 06, 2011 | 1996 Acura TL Series

1 Answer

How do I fix 1999 acura PO505 idle control


They can sometimes be fixed by cleaning-remove it and clean the part that goes into the throttle body, being areful not to spray the top of the unit (don't hold it upside down)-use throttle body cleaner, and remember to clean the bore where the idle air control goes into the throttle body. here is more information on P0505:

http://www.automotivetroubleshootingsecrets.com/P0505%20OBD2%20fault%20codes-15.htm

Jan 06, 2011 | 1996 Acura TL Series

1 Answer

Code P0505 on 1999 Acura TL


this code make reference to low idle engine,maybe the throttle body is dirty , air filter clogged, vacumm leak , pcv valve clogged, check for thoses

Apr 23, 2009 | 1999 Acura TL

2 Answers

1996 dodge ram 1500 p0505 code.whats that mean?


Hi there P0505 code is an idle control system malfunction.

Jan 24, 2009 | 1996 Dodge Ram

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