Code p0505 Code 90505

That code is for the idle speed control valve. Please follow the link P0505 Honda Idle Air Control Valve

P0505 should be the IAC (Idle Air Control) System Malfunction

Hope this helps

Do you understand what exactly sets a P0505? It is not an electrical code, it is purely performance. The code sets when it can't get the idle speed within +200 / -100 of the target for more than x seconds, and it takes a failure in two successive drive cycles to set the code. ANYTHING that can cause an incorrect idle speed can set this code. Vacuum leak, dirty IAC, etc.

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.

P0505 - Idle Control System Malfunctionhttp://engine-codes.com/p0505.htmlForum CodePossible causes- IACV-AAC valve harness is open or shorted
- IACV-AAC valve poor electrical connection
- Faulty IACV-AAC valve

Read more: http://engine-codes.com/p0505.html#ixzz1zVJIt34L

P0505: Idle Air Control Valve System fault, Code P0505
-Vacuum leak
-Dirty throttle body
-IAC motor defective
-Poor electrical connection to the IAC valve, hope this helps and good-day !

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

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

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.

Hi there P0505 code is an idle control system malfunction.