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What is the code for P0505?

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P0505 is the trouble code for idle air control. replacing the idle air control valve usually solves the issue. If that doesn't clear the code,you will also need to change the TPS or throttle position sensor.

Posted on Jan 27, 2015

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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.

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P0505


Its the IAC idle air contorll unit its on the air horn and controlls the air flow at idle This code is saying that something is malfunctioning it is not saying at what RPM it is happening at there is 5 or 6 differant codes for this and they run from P0505 thought P0509 but if you are geting P0505 i would just replace the unit but check the connection to it first it may be a bad connection it dose get weather and heat and that cerates problems with contacts

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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

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

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