Question about 2000 Mitsubishi Eclipse

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Have trouble code P0505

How do I fix it, What does it mean? What part do I need?

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  • mswd40 May 19, 2009

    well the stupid idot light came on we thought it had something to do with the air filter so we fixed it and the light went off but it just came back on. so a friend of ours ran it through the computer and it ran out PO505 so what all do i need to do to fix it please help.. email me if you know anything that can help me from having to spend 300 bucks. nikkiphillips69@aol.com

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Ok...!!! P0505.. Idle Air Control sistem.. first check the harnes is well conected have somebody to helpyou run the engine this device is located in the air housing in the middle move this side to side if you see the engine ligth blinking thats a conector problem otherwise replace this IAC. disconect the ground from the battery so the new item be reconice from the computer

Posted on Feb 26, 2009

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moparhart
  • 245 Answers

SOURCE: 1996 Dodge Grand Caravan 3.3 shows trouble code

Sometimes that code is generated when the charging voltage from the charging circuit is too low and the minimum airflow spec gets lost by the pcm. This can be a bad alternator, battery etc. As well if someone has adjusted the set screw in the throttle body trying to fix the code then I'd suggest retesting with a used throttle body. As well one last thing the intake gaskets/plenum pan on those engines blow out and cause a vaccum leak that can cause spark knock and oil consumption. If that vaccum leak was large enough it could cause your low vaccum reading and that code. As always check the accuracy of the map sensor and tps when dealing with idle speed issues

Posted on Jul 14, 2010

  • 1 Answer

SOURCE: Engine Code P0505

After the IAC is replaced it is not enough to clear the code you must also reset the IAC learned adaptive. To do this you will need a higher end scanner like snap-on or such.

Posted on Jun 17, 2010

  • 5370 Answers

SOURCE: WHAT DOES TROUBLE CODE P0505

P0505 - Idle Control System Malfunction -------The IACV-AAC valve Harness or connectors circuit is open or shorted
- Faulty IACV-AAC valve.
----- The P0505 code is set when the IACV-AAC valve does not operate properly. ----- The idle air control valve is located on the side of the intake manifold right next to the throttle body

-----------
But there was service bulletin released by Ford service center,for same error code.------- This problem was faced by many others to.So due to many other users complaint, this service bulletin was released.-------- To go through the bulletin, click the link:--- http://technoanswers.blogspot.com/2011/08/p0505-on-2004-mercury-mountaineer-46.html ---------- This should help.Thanks.Helpmech.

Posted on Aug 02, 2011

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This is an obd2 code trouble table, it can help you understand the meaning of code.
And for p0505, the 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.
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1 Answer

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