P0505: idle control system malfunction?
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2006 E55 AMG
P0505: idle control system malfunction?
Hey guys,
This evening I got this CEL when pulling into my garage from a day of driving. I did a little research and it seems the culprit might be a loose vacuum hose. After popping the hood I didn't see any disconnected vacuum hose but I did notice a hose going to my airbox wasn't fully engaged. It was **** eyed a little but still on . Could this be the problem? It seems that the hose doesn't want to stay fully engaged and keeps cocking a bit. I'll pickup a hose clamp tomorrow to help secure the hose. What do you guys think, could this really be the problem? I have zero drive-ability issues and all seems well....
?
This evening I got this CEL when pulling into my garage from a day of driving. I did a little research and it seems the culprit might be a loose vacuum hose. After popping the hood I didn't see any disconnected vacuum hose but I did notice a hose going to my airbox wasn't fully engaged. It was **** eyed a little but still on . Could this be the problem? It seems that the hose doesn't want to stay fully engaged and keeps cocking a bit. I'll pickup a hose clamp tomorrow to help secure the hose. What do you guys think, could this really be the problem? I have zero drive-ability issues and all seems well....
?
Thread Starter
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2006 E55 AMG
I'll place a clamp on there and see if it helps. I didn't mention this before but I had the same CEL on my way home from LA. I reset the CEL and it just reappeared tonight? Hopefully I got it figured out and the clamp will permanently resolve the issue. We'll see.
Out Of Control!!
Joined: Sep 2004
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From: San Diego
2015 S212
It does take some time for the car to sense the vacuum or lack of.
In either case, as you said it has NOTHING to do with performance. Many people stick one of those small K&N filters on the end and that is enough. It is an emission thing and has nothing to do with the health of the ride. If it isn't that part, the "leak" can be tracked very easily. Don't bug. It was simple install. It should have had a clamp. When you do put it on, be careful of the CF. Just simple growing pains of doing so many mods so quickly. I would not bug on it.
In either case, as you said it has NOTHING to do with performance. Many people stick one of those small K&N filters on the end and that is enough. It is an emission thing and has nothing to do with the health of the ride. If it isn't that part, the "leak" can be tracked very easily. Don't bug. It was simple install. It should have had a clamp. When you do put it on, be careful of the CF. Just simple growing pains of doing so many mods so quickly. I would not bug on it.
Thread Starter
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2006 E55 AMG
When you find something out let me know and I'll do the same. I'm going to start with the hose going to my airbox and start eliminating from there. After I go through all the lines I'll start questioning the TB.
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From: Abu Dhabi
C218 CLS63TT PP Edition1, W213 E63S
there is a house that comes out from the Y-pipe and goes under the right airbox to the top of the engine ( next to the S/C) maybe it got out or they forgot to put it after installing the new aribox
it may cuase this error
it may cuase this error
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Thread Starter
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2006 E55 AMG
It seems that my P0505 code is okay now but now I get a P9026 "post catalytic fuel trim too lean" CEL. I got this same code with both the LET and PC tune..... I believe PC turned it off so I don't know why I'm getting CEL. All though I do hear a rattling sound inside my exhaust which makes me wonder if possibly my O2 sensor is broken. It's been like this since my mid-section exhaust install. Any thoughts on what else that rattling noise could be.
. I believe PC turned it off so I don't know why I'm getting CEL. All though I do hear a rattling sound inside my exhaust which makes me wonder if possibly my O2 sensor is broken. It's been like this since my mid-section exhaust install. Any thoughts on what else that rattling noise could be.
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From: Philly
997TT, C192 GT63, W464 G550, MS Plaid
It seems that my P0505 code is okay now but now I get a P9026 "post catalytic fuel trim too lean" CEL. I got this same code with both the LET and PC tune..... I believe PC turned it off so I don't know why I'm getting CEL. All though I do hear a rattling sound inside my exhaust which makes me wonder if possibly my O2 sensor is broken. It's been like this since my mid-section exhaust install. Any thoughts on what else that rattling noise could be.
. I believe PC turned it off so I don't know why I'm getting CEL. All though I do hear a rattling sound inside my exhaust which makes me wonder if possibly my O2 sensor is broken. It's been like this since my mid-section exhaust install. Any thoughts on what else that rattling noise could be.
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2006 E55 AMG
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From: Kuwait
CLS55 2006, CLS 63S 2015
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From: Philly
997TT, C192 GT63, W464 G550, MS Plaid
I had oem cats, and after I got my EVO headers installed the oem cats blew through left side first and then the right side and made a noise in the exhaust for a week or so.
Senior Member
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From: Dago, CA
2003 cl55 (sold)
...also have P505 code and can't figure out WTF is wrong... thinking vacuum leak also, but not positive, any help? https://mbworld.org/forums/cl55-amg-...ough-idle.html
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From: Valley of the Sun, Arizona
C63, SL55, E55, CLS55, ML63, C55
It seems that my P0505 code is okay now but now I get a P9026 "post catalytic fuel trim too lean" CEL. I got this same code with both the LET and PC tune..... I believe PC turned it off so I don't know why I'm getting CEL. All though I do hear a rattling sound inside my exhaust which makes me wonder if possibly my O2 sensor is broken. It's been like this since my mid-section exhaust install. Any thoughts on what else that rattling noise could be.
. I believe PC turned it off so I don't know why I'm getting CEL. All though I do hear a rattling sound inside my exhaust which makes me wonder if possibly my O2 sensor is broken. It's been like this since my mid-section exhaust install. Any thoughts on what else that rattling noise could be.What could be happening is you're getting unmetered air in. I had this problem and it turned out to be a air leak between the PipeLine that the Throttle body sits on and the supercharger. Some brake cleaner was sprayed in the area of suspect and the motor stalled, pin pointing the problem and the leak.
So it could be a loose fitting from the install allowing extra air in to the engine (my guess)
Or a few things. including above with also a bad cat or O2 sensor.
Thread Starter
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2006 E55 AMG
are these the same cats provided with the LT's?
do you even have the LT's on ?
do you even have the LT's on ?
No, Chris is in the process of making my LT's.
...also have P505 code and can't figure out WTF is wrong... thinking vacuum leak also, but not positive, any help?
.BTW...how does your car run with the CEL lit up?
What could be happening is you're getting unmetered air in. I had this problem and it turned out to be a air leak between the PipeLine that the Throttle body sits on and the supercharger. Some brake cleaner was sprayed in the area of suspect and the motor stalled, pin pointing the problem and the leak.
So it could be a loose fitting from the install allowing extra air in to the engine (my guess)
Or a few things. including above with also a bad cat or O2 sensor.
So it could be a loose fitting from the install allowing extra air in to the engine (my guess)
Or a few things. including above with also a bad cat or O2 sensor.
One other thing I did notice, the connector on the airbox that the vacuum hoes goes on is loose. I noticed the fitting was loose as I was securing the clamp. I'll seal that up sometime this weekend.
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1994 C220
...also have P505 code and can't figure out WTF is wrong... thinking vacuum leak also, but not positive, any help? https://mbworld.org/forums/cl55-amg-...ough-idle.html
Yeah, I've had the P0505 for about a year now. Horrible rough idle, seems to have gotten worse. Replaced a couple vacuum hoses that looked to be dry rotting, but all other hoses seem to be new and secure. Also replaced the MAF sensor. Not sure what's going on. RPMs are too low to run A/C and come to a complete stop without it dying on me. Not so great for 115 degree AZ heat...
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From: Texas
2003 CL55
I have the same code , after install of my 80mm tb. New motor and old motor. Tune made no difference weather the code came on or not. The code is random for me. May happen in 50 miles after a reset or 350 miles.
Checked all vacuum hoses and clamped them all too.
I feel some of these aftermarket TB`s are not calibrated for our cars. You put a larger TB on and it will let more air through at idle. Just a guess?
Going to put stock TB on and see if that fixes it for now.
Checked all vacuum hoses and clamped them all too.
I feel some of these aftermarket TB`s are not calibrated for our cars. You put a larger TB on and it will let more air through at idle. Just a guess?
Going to put stock TB on and see if that fixes it for now.
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
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From: Toronto
V12TT
bump
My car is going crazy with the idling problem after 15 mins of driving.
CEL came for throttle actuator position or something like that but I cleared it and hasn't came back since...
My car is going crazy with the idling problem after 15 mins of driving.
CEL came for throttle actuator position or something like that but I cleared it and hasn't came back since...
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From: Texas
2003 CL55
What throttle body you have ? Stock? 80mm or 82mm?
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E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
E63 Biturbo, UPD Cold Air induction kit, UPD performance crank pulley and UPD adjustable rear suspension with ride height adjustment.
CL55 UPD Cold Air Boost kit, UPD 3000 stall converter, UPD 77mm SC clutched pulley and beltwrap kit, Custom long tubes, UPD crank pulley , UPD suspension kit, UPD SC pulley, Aux. HE, Trunk tank w/rule 2000 pump, Mezeire pump, UPD 5pc idler set, Aluminum rotor hats.
www.ultimatepd.com
instagram @ultimate_pd
facebook.com/ultimatepd
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V12TT
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'03 E55, Range Rover Sport Supercharged, Ducati 748R
parts wise it's cheap but I doubt you'll get it replaced for under 4hrs labor. iirc, you're gonna have to r/r at least the tb and maybe even the s/c.
