SL/R230: 2005 SL500 - ABC Codes - Misfire
Thread Starter
Junior Member
Joined: May 2020
Posts: 27
Likes: 0
From: Virginia
2009 Sl550, 2009 335d, 2005 Corvette C6, 2017 Armada, 2023 Santa Fe
2005 SL500 - ABC Codes - Misfire
New Here.
Have been lurking around trying to figure out some issues.
I am using a MaxiDAS DS808 to pull codes.
First issue:
I was driving down the highway and i had a quick Red ABC light come on. Pulled codes and it states the following:
C1525-1 Left control critical vehicle level
C1525-2 Right front critical vehicle level
C1525-64 System Pressure Too low
I have no issues with the ABC. Raises, lowers no strain when doing so on engine. However, it does sound as if my pump might be going bad internally, and i have a hissing sound on the front left (driver) quarter panel. Any ideas what this is?
Second Issue:
I have a misfire in cylinder 8 pulling codes:
P2058 - Misfire cylinder 8, damages three way cat
P2050 - misfire, damagers three way cat.
I changed the spark plugs, and checked for spark. We are good there. The only issue i could see would be either the EIS or the Cats?
I am also throwing a couple of under voltage codes. Could it be as simple as my battery?
Any help would be appreciated.
Have been lurking around trying to figure out some issues.
I am using a MaxiDAS DS808 to pull codes.
First issue:
I was driving down the highway and i had a quick Red ABC light come on. Pulled codes and it states the following:
C1525-1 Left control critical vehicle level
C1525-2 Right front critical vehicle level
C1525-64 System Pressure Too low
I have no issues with the ABC. Raises, lowers no strain when doing so on engine. However, it does sound as if my pump might be going bad internally, and i have a hissing sound on the front left (driver) quarter panel. Any ideas what this is?
Second Issue:
I have a misfire in cylinder 8 pulling codes:
P2058 - Misfire cylinder 8, damages three way cat
P2050 - misfire, damagers three way cat.
I changed the spark plugs, and checked for spark. We are good there. The only issue i could see would be either the EIS or the Cats?
I am also throwing a couple of under voltage codes. Could it be as simple as my battery?
Any help would be appreciated.
Banned
Joined: Jan 2006
Posts: 1,982
Likes: 393
From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
First issue: If you got those ABC codes while driving straight on a smooth surface, then they may be a consequence of an electrical glitch of some nature. I would be comfortable disregarding them unless they return. In regard to the hissing, someone else complained of this not long ago. Search here or on Benz World for "hissing".
Second issue: Since you checked the fundamentals, I believe you now want to see the output voltage from the ignition secondary circuit. I imagine few of us have that ability, so you may want to find a tech.
You might want to get a sense of the magnitude of the misfire problem by looking at "Smooth engine running" or the like with your DS808. This shows changes in the speed of the engine crankshaft using the signal from the crankshaft position sensor and is used to detect a misfire.
Third issue: If your car sits idle for c. longer than a few days it is normal to have codes for low voltage. These are of no consequence and can be ignored.
Second issue: Since you checked the fundamentals, I believe you now want to see the output voltage from the ignition secondary circuit. I imagine few of us have that ability, so you may want to find a tech.
You might want to get a sense of the magnitude of the misfire problem by looking at "Smooth engine running" or the like with your DS808. This shows changes in the speed of the engine crankshaft using the signal from the crankshaft position sensor and is used to detect a misfire.
Third issue: If your car sits idle for c. longer than a few days it is normal to have codes for low voltage. These are of no consequence and can be ignored.
Thread Starter
Junior Member
Joined: May 2020
Posts: 27
Likes: 0
From: Virginia
2009 Sl550, 2009 335d, 2005 Corvette C6, 2017 Armada, 2023 Santa Fe
Bobterry99
I was on the highway when the light came on. Came on for a second and went back off on its on. As mentioned, i do here a rattle from the tandem pump, much like if a bearing were going bad in a Ps pump. However, no wobbles etc. I have a video, but i cannot figure out how to upload that here.
I will check the miss, but as of now it isnt very rough. Idle is about 660 rpm if i recall, but jumps up a few rpm in idle. When i changed the plugs it ran fine until I floored the car roughly 30mi after new plugs. Would a bad wire do this? I have not checked resistance on those as of yet, but would like to not have to spend too much money on this thing.
I will search for the hissing, which i also have a video and do not know how to upload.
Thanks for your quick reply.
I was on the highway when the light came on. Came on for a second and went back off on its on. As mentioned, i do here a rattle from the tandem pump, much like if a bearing were going bad in a Ps pump. However, no wobbles etc. I have a video, but i cannot figure out how to upload that here.
I will check the miss, but as of now it isnt very rough. Idle is about 660 rpm if i recall, but jumps up a few rpm in idle. When i changed the plugs it ran fine until I floored the car roughly 30mi after new plugs. Would a bad wire do this? I have not checked resistance on those as of yet, but would like to not have to spend too much money on this thing.
I will search for the hissing, which i also have a video and do not know how to upload.
Thanks for your quick reply.
Super Member
Joined: Jul 2014
Posts: 992
Likes: 245
From: Tucson, AZ
'20 X5 M50i; '17 Ram 3500; Golf Cart; Bikes; Scooters
Regarding the misfire...try swapping the coils and plug wires from 8 to 6. Then see if the fault moves to 6.
If it does, then the coil or plug wires could be the cause of the fault. Pick up a used coil from eBay and see if it fixes the problem.
If fault stays at 8, it could be wiring or something else. In this case, it won't be the plugs.
If it does, then the coil or plug wires could be the cause of the fault. Pick up a used coil from eBay and see if it fixes the problem.
If fault stays at 8, it could be wiring or something else. In this case, it won't be the plugs.
Thread Starter
Junior Member
Joined: May 2020
Posts: 27
Likes: 0
From: Virginia
2009 Sl550, 2009 335d, 2005 Corvette C6, 2017 Armada, 2023 Santa Fe
I swapped the coils. Now the weird thing is everything is working correctly. Any thoughts on why that is?
Now back to ABC. Hissing is definitely from that system, as when I raise car no noise but when set at height it is a continuous noise.
My pressure during rodeo hit a low of 155 bar at one point. But, for the most part it was between 166-176. Is that anything to be concerned about?
Now back to ABC. Hissing is definitely from that system, as when I raise car no noise but when set at height it is a continuous noise.
My pressure during rodeo hit a low of 155 bar at one point. But, for the most part it was between 166-176. Is that anything to be concerned about?
Thread Starter
Junior Member
Joined: May 2020
Posts: 27
Likes: 0
From: Virginia
2009 Sl550, 2009 335d, 2005 Corvette C6, 2017 Armada, 2023 Santa Fe
Swapped the coil. Drove for a couple of days and today the same misfire occurred in the same cylinder. Do you think it’s the MAF or Fuel filter?
I have yet to check compression of the cylinder.
I have yet to check compression of the cylinder.
Junior Member
Joined: Nov 2019
Posts: 62
Likes: 5
SL 500 r230
About the hissing: There is a overpressure release valve in the assembly that is also holding the vibration dampener bulb. (Its located inside the front wheel arch between the wheel and the driverside door) If it is faulty or blocked by some debris, it won't fully close and cause the ABC pressure to be slightly lower than normal. If the suspension bulbs are going bad at the same time, you will get occasional low pressure warnings, especially while riding over bumps.
Trending Topics
Banned
Joined: Jan 2006
Posts: 1,982
Likes: 393
From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
Member
Joined: Feb 2019
Posts: 168
Likes: 21
From: Mississauga, CA
Sl500
Scope would come very handy here, if you have one. Otherwise try swapping injectors with the known good. Don’t forget to put on the new seals.
Thread Starter
Junior Member
Joined: May 2020
Posts: 27
Likes: 0
From: Virginia
2009 Sl550, 2009 335d, 2005 Corvette C6, 2017 Armada, 2023 Santa Fe
Ok so. I replaced all Injectors with refurbished OEM. I still have a Misfire in Cylinder 8 when i hit a wide open throttle. I can reset code and all is good until i were to do that again.
Thoughts?
Thoughts?
Banned
Joined: Jan 2006
Posts: 1,982
Likes: 393
From: Atlanta, unfortunately
'09 S600, (2) R129 300SLs, '03 SL500, '03 SL55
I would check wiring to the fuel injector and to the coils of cylinder #8. If you study the associated wiring diagram you will probably identify where it to take a resistance or voltage measurement for #8 and see how this compares with another cylinder. In particular I think you want to check that there is no break in the wires from cylinder #8 back to the engine management controller N3/10.
The wiring diagrams are a small download: R230 ETM 64. The drawing you need is 07.61-U-2101KB. Notice that you can find a diagram showing the pinout of the electrical connectors to N3/10.
Good luck.
The wiring diagrams are a small download: R230 ETM 64. The drawing you need is 07.61-U-2101KB. Notice that you can find a diagram showing the pinout of the electrical connectors to N3/10.
Good luck.
Last edited by bobterry99; May 25, 2020 at 11:30 PM.
Member
Joined: Feb 2016
Posts: 84
Likes: 19
C300 and SL500
Adrian,
I had a similar misfire on my 2004 a few years ago. My indie kept the car for two weeks and jumped through all sorts of hoops with plugs, coils, leads, fuel, sensors. He was about to give up when someone suggested a bad cat. A mechanic got underneath and tapped one of the cats. It was shot! He replaced it and the problem was solved. He did explain the feedback loop that causes the misfire, but I don't remember the details.
Symptoms sound very similar to yours - heavy acceleration, when engine is hot, problem seems to go away occasionally and then comes back...
At the time Rodney commented that a bad cat doesn't happen very often, but it does happen.
Good Luck
Gary
I had a similar misfire on my 2004 a few years ago. My indie kept the car for two weeks and jumped through all sorts of hoops with plugs, coils, leads, fuel, sensors. He was about to give up when someone suggested a bad cat. A mechanic got underneath and tapped one of the cats. It was shot! He replaced it and the problem was solved. He did explain the feedback loop that causes the misfire, but I don't remember the details.
Symptoms sound very similar to yours - heavy acceleration, when engine is hot, problem seems to go away occasionally and then comes back...
At the time Rodney commented that a bad cat doesn't happen very often, but it does happen.
Good Luck
Gary
Thread Starter
Junior Member
Joined: May 2020
Posts: 27
Likes: 0
From: Virginia
2009 Sl550, 2009 335d, 2005 Corvette C6, 2017 Armada, 2023 Santa Fe
Thanks for the input. I will try and check for resistance tomorrow.
The cat has me wondering whether or not it could be bad, as I was throwing a catalyst code, but nothing from the O2.
If it is indeed the cat, can these be replaced with universal high flow cats? As, I wanted to switch them out for a high flow anyways. Especially seeing that they can be had for about 120 a pop.
Thanks,
The cat has me wondering whether or not it could be bad, as I was throwing a catalyst code, but nothing from the O2.
If it is indeed the cat, can these be replaced with universal high flow cats? As, I wanted to switch them out for a high flow anyways. Especially seeing that they can be had for about 120 a pop.
Thanks,
