Honda CR-V Owners Club Forums banner

1 - 7 of 7 Posts

·
Registered
Joined
·
5 Posts
Discussion Starter #1
Owner of a 2002, been having fault code P0505 fault codes recently. This code is centered around idle control issues. My symptoms are a mildly fluctuating idle when in park, bounces between 1100-1200 rpm. You can often times here the engine slightly revving, idling, revving, idling, etc. The car seems to be lightly "searching" in between first and second gear for the correct coasting speed when my foot is taken off the gas. Normal highway driving is not an issue.

Decided to check for vacuum leaks first. Replaced my old intake hose and intake manifold gaskets. Psi reads normal in the intake manifold, didn't seem to be the main issue, but didn't hurt to check. The new parts seem to have given me a slight boost in power from what I remembered. Check engine light back on though after clearing codes.

I then swapped out my idle air control valve for a new one and checked for carbon buildup in the throttle body, seems clean to me. That helped for a few days, then it slowly regressed back to triggering the fault code again.

I'm stumped. I'm thinking this maybe a faulty sensor or connector then? Maybe the TPS? Any advice would be greatly appreciated!
 

·
Registered
Joined
·
5 Posts
Discussion Starter #5
I replaced the IAC, but I'm still having the same issues more or less.
The link had several things to check before changing the IAC, so I'd check those, too. <img src="http://www.crvownersclub.com/forums/images/smilies/smile.png" border="0" alt="" title="Smile" class="inlineimg" />
Thank you, help me understand why bleeding and refilling the coolant would help the idle issue. I've seen this possibility posted in other articles as well.
 

·
Registered
Joined
·
895 Posts
Fuel injected cars use coolant temp to adjust the fuel map. If there were an air pocket around the sensor, it would misreport. I’m not entirely sure it would cause idle hunting, but it would for sure cause fuel trim problems. I think in that article they are referring more to the ability to preheat the IACV. Kinda sounds to me like you have a vacuum leak somewhere. Maybe wiggling that stuff around kinda sorta sealed it up a little better for a few days. Check it with it cold and before disturbing anything on the engine.
 

·
Registered
Joined
·
5 Posts
Discussion Starter #7
Fuel injected cars use coolant temp to adjust the fuel map. If there were an air pocket around the sensor, it would misreport. I’m not entirely sure it would cause idle hunting, but it would for sure cause fuel trim problems. I think in that article they are referring more to the ability to preheat the IACV. Kinda sounds to me like you have a vacuum leak somewhere. Maybe wiggling that stuff around kinda sorta sealed it up a little better for a few days. Check it with it cold and before disturbing anything on the engine.
Thank you. I just can't seem to find the leak. Do you think it may be a faulty PCV valve? I noticed fresh oil in and around the intake manifold when I replaced the gaskets.
 
1 - 7 of 7 Posts
Top