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Intermittent P0505

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Old Sep 17, 2024 | 06:40 AM
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Default Intermittent P0505

Hi all,
I’m getting a very intermittent P0505 code- unstable idle air. It’s a 2021 softail, 30/30 cam, V&H Pro Pile 2-1, Power Vision, FM BMF air filter. I’m pretty sure it’s in my tune, but I can’t pin down exactly when it started to the changes I’ve made. I’m going to backtrack by loading my earlier tunes, but this is going to take me a while since it’s so intermittent and I have long trail of tunes that I have made. As far as symptoms— none. I pretty much have the bike dialed in. Runs great, idles great.. just pops up with this code while idling once in a while.
like I said, I know how to track it down, but unless I get lucky, it’s going to take me a while 😭

Steve
 
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Old Sep 17, 2024 | 09:14 AM
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What's your tps doing at idle?
 
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Old Sep 17, 2024 | 09:45 AM
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Originally Posted by Lonewolf176
What's your tps doing at idle?
4.1 and 5
actually it’s more like 4.1 and 4.5
Attachment 628759
 

Last edited by stroisi12; Sep 17, 2024 at 10:15 AM.
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Old Jan 5, 2026 | 04:43 AM
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I know it’s been a while, but it just dawned on me that I never reported back after I found the issue and fix. It turned out to be VE tuning. I did some VE smoothing in the low tp and rpm area and the problem disappeared. It’s been way long enough to claim victory. I just wanted to give a heads up in case anyone runs into this.
 
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Old Jan 5, 2026 | 07:01 AM
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Thanks.. So many don't get back..
 
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