P0505

1.8-liter VVTL-i (2ZZ-GE) and VVT-i (1ZZ-FE) engine, transmission, exhaust, intake, and performance tuning discussions
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inthelate80s
Posts: 2
Joined: Sat Apr 06, 2024 4:53 am

P0505

Post by inthelate80s »

My ‘04 GT has been cutting out and dying when I cold start it. After a few times dying it will stay running. I pulled code P0505 for “Idle Control System Malfunction”. I don’t necessarily want to go replace the IAC because it’s $250 on rock auto. Should I go ahead and do it anyways or look into something else?
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joatmon
Posts: 10165
Joined: Fri Mar 21, 2003 5:19 am
Location: Room 101

Re: P0505

Post by joatmon »

I don't know what to offer other than the attached PDF which is the troubleshooting steps for a P0505 from the 03 Matrix (XRS/2ZZ) book. Maybe you'll get lucky and it'll be because of step 2, PCV hose.

just because I had it, I also uploaded the steps for P0505 for a base (1ZZ). looks the same as the 2ZZ one, maybe there's a difference that would show up under a thorough review
Attachments
cip0505.pdf
03 Base (1ZZ) P0505
(22.64 KiB) Downloaded 43 times
cip0505.pdf
03 XRS (2ZZ) P0505
(22.63 KiB) Downloaded 38 times
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