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What are the probable causes of DTC P0505?

Car idle hunts at 1500 idle and also slightly at and especially during warm up

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P0505 idle speed control valve, throttle motor or throttle valve sticking

Posted on Dec 14, 2015

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2008 kia spectra PO505 code reset


DTC P0505: Idle Air Control system problem
Probable causes:
  1. Sensor or solenoid faulty
  2. Connector terminal contact damaged or corroded
  3. Control unit software needs updating
  4. PCM or ECM faulty
  5. Vacuum leaks, damaged hoses or incorrect routing

May 02, 2017 | Kia Cars & Trucks

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What does DTC P0505 mean?


P0505: Idle Control System Malfunction. The computer controls idle through the idle air control motor or valve. It would be mounted on the throttle body assembly.

Mar 11, 2015 | 2003 Toyota Sienna

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1998 suzuki swift idle problems 4 speed 1300cc


no engine type stated, there are 6 engines used.
but bad idle is caused by 2 things.
  • misfire.
  • or lean AFR, lean fuel mix.. causes HUNTING
the ECU can also cause the hunt if it can not hold hot idle to spec.
most cars is 800rpm.

Jun 26, 2014 | Suzuki Swift Cars & Trucks

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My 1999 Chrysler town & country limited my engine light came on. I whent to get a test done, it said DTC Reported P0505= idle control system malfunction P0351= Ignition Coil A Primery/secondary Circuit...


-Possible causes are Faulty Idle Control System motor
- Idle Control System motor harness is open or shorted
- Idle Control System motor circuit poor electrical connection
- Faulty Powertrain or Engine Control Module
- Vaccum leaks or damaged hoses or improper routing check for vaccum leaks first if this was helpful please leave good feed back


Read more: http://engine-codes.com/p0505_chrysler.html#ixzz3Mq1J8Bho

Oct 29, 2013 | 2007 Jeep Grand Cherokee Overland

1 Answer

2000 dodge ram TCS been replaced still get code p0505


Code 505 is for a problem with the idle air control valve.
It could be the valve, or a dirty throttle body, or a problem in the harness.
If you replaced the IAC and the throttle body is clean, and the code remains, you probably need to open the harness and check the wires.

Aug 18, 2012 | 2000 Dodge Ram 1500 Truck

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SMALL PROBLEM ROUGH IDLE.SMALL VIBRATION WITH MOTOR-DASHBOARD MAKES VIBRATION SOUND. 2003 NEON HAS 130,000 MILES BUT FEELS LIKE IT RUNS COLD ALL THE TIME.WHEN IT FINALLY WARMS UP IT RUNS KINDA BETTER BUT...


You need to find out what DTC the vehicle sets when the check engine light comes on. This will help you diagnose the problem. The engine is misfiring causing the rough running concern and probably the vibration in the dash. The DTC will tell you what specific cylinder the misfire is in P0300-304 or if the fuel is metering too lean P0171. Then you can check the appropriate system for a fault. you'll need to get a generic OBD2 code puller (local parts stores sells these things). let me know what specific DTC's you pull and I'll see if I can help you further.

Jan 26, 2010 | 2003 Dodge Neon

1 Answer

1996 dodge ram 1500....p0505


p0505 is a code for your IAC (idle air control valve) located right below the TPS (throttle positioning sensor). Beware it is not necessarily the sensor. If you use a test light on the connection coming to it while the vehicle is running and rev the motor each terminal (probably four) should flash. In this case it is most likely your sensor. If not it is in the wiring or your pcm.

Feb 24, 2009 | 1996 Dodge Ram

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Mazda astina bg series 1992 has an idling problem .It idles between 900-1500 rpm after warming up.Should cut back to around 750rpm idle speed after warming up. Could you please give me an idea what might...


the idle air motor in the throttle body is probably not working right it lets more air in the intake when its cold and is supposed to shut off when it warms up if its not shuttin off then it is probably not closing

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