Honda S2000 P0505: Idle Air Management System- Malfunction

P0505 is an OBDII code that offers with the idle air management system within the Honda S2000.  It’s a generic code, which implies that it has the identical which means for the S2000 as it could every other car (S2000 or not).

P0505:  Idle Air Management System:  Malfunction

When P0505 is triggered, it's usually brought on by a caught idle air management valve, a clogged idle air management valve, or a vacuum leak.  There might be different causes as nicely.  Though, they aren’t as prevalent.

P0505 Honda S2000


Índice de Contenido
  1. P0505 Signs:  Honda S2000
  2. S2000 P0505 Causes
    1. Idle Air Management Valve
    2. Vacuum Leak
    3. Carbon Buildup
  3. Conclusion

P0505 Signs:  Honda S2000

This explicit hassle code lets you realize that there's something flawed with the idle air management system, however that’s about it.  Which means that the signs can fluctuate.

Listed here are a number of the most typical signs of P0505:

  • Service engine quickly mild
  • Tough idle
  • Stalling
  • Excessive idle pace 


S2000 P0505 Causes

Sometimes, P0505 goes to be brought on by both a vacuum leak, or an issue with the idle air management valve.  Whereas changing the idle air management valve looks as if a good suggestion, it’s price your time to verify for a vacuum leak first.

Honda S2000 P0505 Diagnosis

Idle Air Management Valve

The idle air management valve’s main job is to control the idle pace of your engine.  It does this by letting in simply the correct quantity of air to get the idle pace the place it must be.

The IAC valve can get both soiled or caught.  Chances are you'll want a brand new one, otherwise you could possibly get away with cleansing it.  Right here’s a terrific YouTube video on clear a idle air management valve.  

If you happen to decide that you simply want a brand new idle air management valve, they're comparatively inexpensive.


Vacuum Leak

Whereas the idle air management valve is commonly the reason for P0505, it’s a terrific concept to start out diagnosing it by on the lookout for a vacuum leak.  Examine the vacuum tubes across the IAC.  If they give the impression of being cracked or dry rotted it might be time to switch.

Consumption manifold leaks, and leaks across the throttle physique may code your S2000 to throw this code.  Right here’s a terrific article from In style Mechanics on discover a vacuum leak.


Carbon Buildup

The IAC inlet space can get carbon buildup on it.  Inspecting the world across the IAC for passages blocked with carbon can typically repair the issue.

If the throttle physique will get soiled sufficient, it could change the quantity of air capable of get into the engine.  It may well throw P0505.  Usually, when that is the case, you’ll really feel the engine stall for a second earlier than it recovers when slowing down.  

This occurs as a result of the engine can’t alter to this downside quick sufficient.  Cleansing it across the throttle blades will clear up the issue on this case (more often than not).



Good luck diagnosing P0505 in your S2000.  More often than not it’s a vacuum leak or the idle air management valve.  If you happen to really feel like there’s something which you could add, please be at liberty to depart a remark beneath.

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