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2000 jeep grand cherokee 4.7 p0505 code. replaced the pcm and IAC. twice. still same code. checked wires from pcm to IAC. ALL are within spec. bypassed wiring with different wires. stills has same code.

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Posted on Jan 02, 2017

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SOURCE: 2003 jeep grand Cherokee with the 4.0 has a code

It marks the code P050 already change the valve iac but it is still equal and continues marking the same code

Posted on Aug 21, 2009

  • 5370 Answers

SOURCE: 2004 Jeep Cherokee 4.0 getting Error code P0505, I

Yes its possible that PCM, is issue, but its not possible that PCM is issue.--------- Do you notice the difference after replacing the idle, was the idle high or low before replacing the IAC valve? And did the idle problem solved after replacing the IAC valve.----------- The check engine light will need to be reset with a scan tool, or you can wait and the computer will reset after the computer has seen that the problem is gone for a certain amount of starts. This is assuming that the IAC was actually the problem, there are other causes that can cause this code to set but if the idle was to high and now it is good the problem is likely fixed. some times it takes approx next 100 or 50 drive cycles to automatically reset the code.------------

But if you still notice the idle problem, even after replacing the IAC valve, then other possible causes for this same error code P0505 are:---

  • Stepper motor Coil 1 or 2 circuit is open or shorted to ground.
  • Stepper motor Coil 3 or 4 circuit is open or shorted to ground.
  • Stepper motor coil circuit(s) shorted to system power (B+).
  • Stepper motor is damaged or has failed.
  • PCM has failed.
  • ----------- But yes if all checked ok, then it faulty PCM.----- It has to be replaced by dealer.This will help.Thanks.Helpmech,.

    Posted on Jul 08, 2011

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    2 Answers

    What else, Check Engine Light, P0505, p0135, p0155, p1494 codes?


    You can not work on a vehicle as your doing

    Your checking for generic codes only & throwing
    parts at it

    You get a couple possible worn or failed parts & have
    a few less codes

    There is no need to clear ALL Data every time you change a part

    You need to STOP

    You need professional scan tool software to look at ALL data & go for a road test first

    You keep clearing stored data ,so now the process will take longer

    You work one code & one system at a time

    NO PARTS get replaced that are not tested & found to fail
    a test,thus a worn out part.

    You need both Factory Emission & Diagnostic Manual, as well
    as Wiring Diagram Book-- BEFORE-- you can even walk to the vehicle (Helm.Com)

    You have nothing to go by,no system knowledge & no trouble charts,& no wiring diagrams to start your testing

    If you got no scan tool & no volt meter & no oscilloscope,
    your done,vehicles have to be tested to find a problem,any
    problem,resolve it & continue on.

    May 19, 2014 | 2004 Jeep Grand Cherokee

    1 Answer

    Check engine light came on code P0505, P0135, P0155, P1494.


    kia ora Mark , greetings , sorry bro these code things are beyond me ive been driving around with a p0161. i believe its a bank2 down stream sensor for 2 years , maybe you can help me , 2002 grand cherokee 4.7 Ho , do you know what brand of sensor or part numbers i need , an idea of cost for same . i forgot to mention i am in New Zealand and auto parts are so much more expensive here , no idea at all , much help needed everyone thank you all , hope you get sorted Mark cheers mate

    May 19, 2014 | 2002 Jeep Grand Cherokee

    1 Answer

    Nissian path finder 2000 code p0505


    That is idle air control (IAC) system malfunction,it's causes may 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; or PCM has failed
    You can clearing the fault codes. Then unplug the IAC and start the engine. 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.

    Hope this helpful.
    greetings

    Plus: DTC table click here.

    Nov 10, 2011 | 2000 Nissan Maxima

    2 Answers

    Can u help me find what the code p0505 is for a 1997 plymouth voyager please?


    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.
    I know this tool can hekp you clear the code. hope help.

    Jul 13, 2011 | Plymouth Voyager Cars & Trucks

    2 Answers

    2001 maxima engine service light for p505 looking to find out how much would this cost for repair


    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.

    Around $200.00 for parts, labor and fees.

    Apr 14, 2011 | 2001 Nissan Maxima

    1 Answer

    Vehicle idle very low code p0505 said idle system control problem what part can b bad and check engine light is on


    Causes: 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 helps (remember to rate and comment this).

    Dec 24, 2010 | 2000 Chevrolet Prizm

    1 Answer

    I have Grand Cherokee 1999 V8 4.7 220700 mphproblem: obd Give P 0505 1. Start good rbm at 750 as it heat rbm go up till 1500 2. When the heat come to middle oil pump fall down for a second and come...


    P0505 - Idle Air Control System Malfunction The PCM attempts to control engine speed during KOER self-test. The test fails when the desired rpm could not be reached or controlled during the self-test. IAC circuit open
    VPWR to IAC solenoid open
    IAC circuit shorted to PWR
    Air inlet is plugged
    Damaged IAC valve
    Damaged PCM
    The IAC solenoid resistance is from 6 to 13 ohms.

    Check it.

    Jul 02, 2010 | 1991 Jeep Cherokee Briarwood

    2 Answers

    2003 jeep grand Cherokee with the 4.0 has a code


    P0505
    Idle speed continues to vary greatly from the target speed
    (2 trip detection logic)
    IAC valve is stuck or closed
    Open or short in IAC valve circuit
    Open or short in A/C signal circuit
    Air intake (hose loose)
    MARKO

    Aug 11, 2009 | 2003 Jeep Grand Cherokee

    2 Answers

    My car died a couple of days ago when I was driving. The codes P0505 and P0123 appeared. I replaced the sensors and the car still won't start and P0505 was still showing up


    the idle air control valve is on the throttle body below the throttle positioning sensor. To test first, use a test light on the connection coming to it with the vehicle running. Rev the motor and each terminal should make the light flash. In this case it is most likely the sensor. If they do not flash it is in the wiring or pcm

    Oct 04, 2008 | 2000 Jeep Grand Cherokee

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