hey anyone got code p0505 idle speed control malfunction? i know it has a freakin malfunction but stupid obd2 scanner says that! anyway to diagnose on what part of the system? and where is the ISC circuit in the PCM/ECU? it doesnt say its low or high circuit, doesn't say IAC/ idle air control valve/motor cuz it has those as other codes
also i gota p0430 =( looks like i need a new cat. think i should get a high flow cat? suggestions?

 

P0430 is for your front pre-cat, not the main cat.

See this thread for some info:

http://forums.maxima.org/showthread.php?t=443615

As for the 505 code, see if you can download an FSM for more details on that.

 

wat is a FSM. full service manual?

 

Factory service manual.

 

thanks, a little intake leak right after the MAF or IAT (intake air temp) sensor caused it. i think its the IAT anyway though IAC would solve that, but nope. fixed. thanks guys