Originally Posted by WANTED!!

Yup, I can make it stall on a steep enough grade if I leave the car parked outside overnight and the morning temps are cold enough even with about 3 minutes of warm-up/idle.
Interestingly, it doesn't occur if I have the sensor plugged in and drive it under the same conditions, if the sensor is unplugged but the car is parked in my garage overnight, or if I drive the car around the neighborhood for a bit before hitting that same hill.
Only when the car is too cold/outside overnight, temps are low enough at time of driving, the sensor is unplugged does do this only once. Also interestingly, it doesn't re-occur unless the car sits overnight. I have to deliberately recreate those conditions to do it. If the sensor is plugged in, I can't recreate this.

If this changes before I leave the country, I'll report back.

Originally Posted by TomZVB

Not much to add here but just want to mention that I drive the heck out of my SL63 (perf package, no tune), the solenoid has been unplugged for about 1500 miles, and never once have I had a stalling issue. I do wait for the oil temp to reach proper operating temp before giving it hell, but I’ve been out in sub-30 degree weather and have run it to redline without a single complaint. I pulled the plug (out of the front cover, lol) almost three months ago. We don’t have a many hills here at the

Regarding the stalling issue, it would be good to know what oil pressure is like at startup (and on an incline). Maybe you have a stuck solenoid and the engine is failsafe-ing itself?

Originally Posted by AMGandS1K

If you don't mind humoring me and answering the previous questions I posted, that'd be a big step forward to investigating this issue. You really should recreate this with an OBDII logger. If the engine is stalling there is bound to be a code of some kind.

Originally Posted by WANTED!!

I'm quoting myself from back at the very beginning of the conversation to reinforce why I'm making the below commentary. I'd also like to note I've owned my car since 2018, tuned in tuned since 2020 to its current state, and know it's behavior extremely well.

Been hesitating to report this, but I do have a negative behavior associated with the sensor unplugged vs being plugged in. In colder weather (40(s)f and below), when I first drive the car if I don't drive it hard enough for about 5 minutes it'll stall /bog out under high load/low throttle. I've stalled it multiple times on a hill in my neighborhood on the way to work in the morning .

Did the transmission adaption reset, and no change. Replaced my throttle pedal, no change. Out of morbid curiosity, plugged in the sensor and it went away. Unplugged it overnight, it came back.

I'm torn as I feel the pros of having the sensor unplugged outweigh the cons. However, this behavior goes back to what I initially said near the beginning of the thread that I'm hard pressed to believe the sensor doesn't have some other affect associated with it other than just oiling. Clearly it does. Or I shouldn't be able to do this.

What this tells me is the ecu is telling the sensor to reduce/increase oil flow to some extent based on load and temps. While the primary purpose may be emissions and fuel efficiency, that clearly has an effect on low rpm drivability that may need some adjustment in the ecu to compensate for this change.

Originally Posted by WANTED!!

What I haven't tried is running a ghost sensor to see if that affects behavior. I'm running out of cold temp days and will be unable to do anything more with the car beyond driving it as I'm leaving the country for a while due to work. Someone else would have to try it and report on that one.

Originally Posted by WANTED!!

Time out. Are you actually saying my own findings, which are in a small part in contrast to the overwhelming "perfection" that this mod has claimed to be, have no value because I cannot recreate everyone else's level of modifications?

Last time I checked, NO ONE in the thread has been held to that standard let alone have the abilities to recreate every weather, temperature, and load condition. Heck, no one has yet to put the car on a steady state dyno and do a full before and after comparison of normal driving under varying temperatures , load and throttle.

If you REALLY want to go there, then let's go there and say nothing presented in this entire thread is conclusive to the community because none of that has happened.

Otherwise, let's take my findings for what they are, a point of data for the pool as an area for folks to either explore more in-depth or just add to the overall input so far.

Sorry I found a side effect I wasn't looking for or expected. Sorry I put in my time to experiment further. Sorry I could recreate my findings under limited conditions. Sorry the mod everyone loves probably isn't perfect.

Originally Posted by WANTED!!

I do mind humoring you, so no.

I don't have a logger, otherwise that would be a non-issue. I do have an sds. When time permits, I'd be happy to scan for codes. However, it hasn't thrown a check engine light when it does it.

Frankly, I did not go looking for or expecting to find this. This was an absolutely unexpected finding on my part. I simply plugged the sensor back in to rule it out as my problem fully expecting there to be more, and not expecting the sensor to fix my problem. Me repeating the experiment over days on end was me saying "this has to be a fluke". I'm more shocked than anything that it wasn't.

I'm otherwise happy with this mod. Overall, the car feels better.

Originally Posted by JettaRed

Anecdotally, @WANTED!! has observed symptoms that lead him to believe the solenoid mod is causing the strange behavior. He has decided to share that observation. Quite a few responses seem adversarial, or at least defensive, though I don't think they are meant to be. Group hug?

I do believe that while unplugging the solenoid is a cause of this behavior, it may not be the root or only cause, but has somehow amplified hidden problem that needs to be investigated. Just because a problem does not trigger a CEL does not mean there is not a code waiting to be uncovered. The P06DA00 is a perfect example. CELs are only triggered if the fault has a direct affect on emissions--they do NOT alert on every problem. That's why waiting for a CEL is not a good idea. Get a proper Mercedes scanner and know for sure.

Originally Posted by JettaRed

Anecdotally, @WANTED!! has observed symptoms that lead him to believe the solenoid mod is causing the strange behavior. He has decided to share that observation. Quite a few responses seem adversarial, or at least defensive, though I don't think they are meant to be. Group hug?

I do believe that while unplugging the solenoid is a cause of this behavior, it may not be the root or only cause, but has somehow amplified a hidden problem or problems that need to be investigated. Just because a problem does not trigger a CEL does not mean there is not a code waiting to be uncovered. The P06DA00 is a perfect example. CELs are only triggered if the fault has a direct affect on emissions--they do NOT alert on every problem. That's why waiting for a CEL is not a good idea. Get a proper Mercedes scanner and know for sure.

Originally Posted by juanmor40

Apologies if it came across that way. Nobody here is being held to any standard.

What I meant is that more tests are required since there are now 2 variables involved in your case. If we do not complete "all the tests", it is difficult to conclude, only a possible cause. That is all. I also understand that the tune being flashed, and non-removable, the other tests are not possible preventing us from concluding something. It becomes antoher data point for the analysis

A similar argument we had with the true CEL, and no CEL differences. After understanding that some cars have the oil pressure sensor, we sorted out that issue.

Originally Posted by zk2004mb

No we did not sort out the CEL issue. Only conclusion we have so far is adding dummy solenoid can bypass the CEL. We do not know the cause of CEL. No proof that it was caused by oil pressure sensor so far.

Originally Posted by OldManAndHisCar

Yes, in the seconds right as I start the car, after 45 secs or so it drops and there is the audible change. Same behavior in our GLS, only the GLS is never not smooth.

Originally Posted by kevm14

It could also just be hitting closed loop 45 seconds into a cold start, to cause a change in idle/sound. Or the catalyst warmup idea I had earlier.

Originally Posted by Lotty

Hi mates,
my Car w176 AMG A45 MJ2017 facelift stock
i got this code P06DA00 by 53k miles and drove without any problems 10k miles now. If i dont have any scanner "Prodiag" ​
I would never have known. My oldschool mechanic told me to repair this for 600€
Can i ignore this code for my car too ?

Originally Posted by CaliBenzDriver

Normally this P06DA00 code is the lucky one everyone here wish they had without having to unplug...

Many cars with this code have a harness defect that perfectly disables the low oil pressure, the way we like.

Even for free I would not get my oil pump fixed to enable low pressure!!

Originally Posted by WANTED!!

I do mind humoring you, so no.

I don't have a logger, otherwise that would be a non-issue. I do have an sds. When time permits, I'd be happy to scan for codes. However, it hasn't thrown a check engine light when it does it.

Frankly, I did not go looking for or expecting to find this. This was an absolutely unexpected finding on my part. I simply plugged the sensor back in to rule it out as my problem fully expecting there to be more, and not expecting the sensor to fix my problem. Me repeating the experiment over days on end was me saying "this has to be a fluke". I'm more shocked than anything that it wasn't.

I'm otherwise happy with this mod. Overall, the car feels better.

Originally Posted by kevm14

I think the statement is, we don't know why the vehicles with oil pressure sensors trigger a CEL for P06DA00 when the other vehicles just have the silent code. What part about having an oil pressure sensor makes it an emissions issue? It could be that there is some arcane rule in OBD-II land where IF you sense engine oil pressure, engine oil pressure related codes have to illuminate the CEL. I could see that. It means literally nothing though, and is of no consequence to this mod.

Originally Posted by Lotty

Oh nice, im a lucky guy

Originally Posted by Lotty

Wow i already saw this Video...
I change every 6 months or max 120h my oil. On next service i will unplug this s***
Or i will show tomorrow maybe i can unplug this cable on top. But im sure i need a lifting platform and unplug it from the bottom. IDK.

Originally Posted by JettaRed

I can't speak for V8 engines, but our V6 engines can be accessed from the top. You just need to remove the intake tube running from the grill to the airbox to reach down and unplug it.