2008 S600 - Randomly not starting when hot
Thread Starter
Super Member
Joined: May 2011
Posts: 556
Likes: 10
From: UK
S55K AMG
2008 S600 - Randomly not starting when hot
Hello all
In the last 3 weeks the car has failed to start on 3 seperate occasions. Each occasion being about 7 to 10 days apart, and only when the car has been hot.
For instance, the last time it happened 2 days ago this is how it went.
First time it happened, i did not scan it. Second time it happened near the garage so i scanned it with a SNAP-ON machine, fault code it below. Third time it happened, as described above, there was no fault code
"Instrument Panel - 9135 - Fuel tank sensor tight installation recognition: The signal from the fuel tank sensor 2 is not plausible"
Anybody make sense of the above code, do i need to replace the sensor in the fuel tank, the module or the entire sender unit?
Thanks
In the last 3 weeks the car has failed to start on 3 seperate occasions. Each occasion being about 7 to 10 days apart, and only when the car has been hot.
For instance, the last time it happened 2 days ago this is how it went.
- Started the car up in the morning with no problems
- Drove it about 2 miles and turned it off, started again 5 minutes later with no problems
- Drove half a mile more and turned it off, started again 10 minutes later with no problems
- Drove it another mile back home and turned it off, started up again about 2 hours later with no problems.
- Drove another 2 miles, stopping and starting it again with no problems.
- Drove 90 miles and then turned it off for 5 minutes, started no problem.
- Drove another mile, turned it off for 20 minutes to pick my neice up from school, came back to it and it would not start. Tried and tried to crank it about 10 times over the course of an hour but it would not start. So i left it there.
- Went back to it 4 hours later and it started up fine
- Been 2 days now and its been ON and OFF fine with no issues.
- BUT, i know its going to do this again in another few days and god knows where its going to leave me stranded at that time.
First time it happened, i did not scan it. Second time it happened near the garage so i scanned it with a SNAP-ON machine, fault code it below. Third time it happened, as described above, there was no fault code
"Instrument Panel - 9135 - Fuel tank sensor tight installation recognition: The signal from the fuel tank sensor 2 is not plausible"
Anybody make sense of the above code, do i need to replace the sensor in the fuel tank, the module or the entire sender unit?
Thanks
Super Member
Joined: Jan 2006
Posts: 579
Likes: 37
Hello all
In the last 3 weeks the car has failed to start on 3 seperate occasions. Each occasion being about 7 to 10 days apart, and only when the car has been hot.
For instance, the last time it happened 2 days ago this is how it went.
"Instrument Panel - 9135 - Fuel tank sensor tight installation recognition: The signal from the fuel tank sensor 2 is not plausible"
Anybody make sense of the above code, do i need to replace the sensor in the fuel tank, the module or the entire sender unit?
Thanks
In the last 3 weeks the car has failed to start on 3 seperate occasions. Each occasion being about 7 to 10 days apart, and only when the car has been hot.
For instance, the last time it happened 2 days ago this is how it went.
- Started the car up in the morning with no problems
- Drove it about 2 miles and turned it off, started again 5 minutes later with no problems
- Drove half a mile more and turned it off, started again 10 minutes later with no problems
- Drove it another mile back home and turned it off, started up again about 2 hours later with no problems.
- Drove another 2 miles, stopping and starting it again with no problems.
- Drove 90 miles and then turned it off for 5 minutes, started no problem.
- Drove another mile, turned it off for 20 minutes to pick my neice up from school, came back to it and it would not start. Tried and tried to crank it about 10 times over the course of an hour but it would not start. So i left it there.
- Went back to it 4 hours later and it started up fine
- Been 2 days now and its been ON and OFF fine with no issues.
- BUT, i know its going to do this again in another few days and god knows where its going to leave me stranded at that time.
"Instrument Panel - 9135 - Fuel tank sensor tight installation recognition: The signal from the fuel tank sensor 2 is not plausible"
Anybody make sense of the above code, do i need to replace the sensor in the fuel tank, the module or the entire sender unit?
Thanks
It ended up being the fuel pump. The next time you get a no start condition check to see if you have any fuel pressure in the lines.
My guess is you will not.
Good luck
Johan
I just realized it was for your W221 not your old W220. Sorry for the confusion.
Thread Starter
Super Member
Joined: May 2011
Posts: 556
Likes: 10
From: UK
S55K AMG
A few years ago my 2003 S55 had very similar issues. Random no start for no good reason.
It ended up being the fuel pump. The next time you get a no start condition check to see if you have any fuel pressure in the lines.
My guess is you will not.
Good luck
Johan
I just realized it was for your W221 not your old W220. Sorry for the confusion.
It ended up being the fuel pump. The next time you get a no start condition check to see if you have any fuel pressure in the lines.
My guess is you will not.
Good luck
Johan
I just realized it was for your W221 not your old W220. Sorry for the confusion.
Im going to see if i can find a fuel line thats relatively easy to take off whilst trying to crank it, but thanks for that suggestion anyway.
Senior Member
Joined: Nov 2017
Posts: 389
Likes: 52
Mercedes Benz S600
Man, if you were getting the "crank position sensor" code I wouldn't be surprised. I'm dealing with that now, but I'm getting that code and it happens if you try to restart a hot car within 10 min.
Thread Starter
Super Member
Joined: May 2011
Posts: 556
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From: UK
S55K AMG
The second one gave the same opinion as yourself that it's quite possibly the "Crankshaft Position Sensor" as well, even though no codes came up. But his explanation was that this sensor does not always throw up a code, especially when doing it randomly after a week or so like this.
We both agreed that its less than a £100 to get it done, even if its just for the sake of it. I've bought a genuie Mercedes sensor, trying to locate where the old one is so i havn't swapped it out yet, but rather ironically, the car hasn't failed on me since starting this thread
Thanks for that pointer anyway, very much appreciated.
Thread Starter
Super Member
Joined: May 2011
Posts: 556
Likes: 10
From: UK
S55K AMG
Like i said, mine was doing it about once a week quite randomly, after a very long trip.
Senior Member
Joined: Nov 2017
Posts: 389
Likes: 52
Mercedes Benz S600
You CPS is locate on the transmission bell housing, on the driver's side. It can be done if you're reasonably handy. A shop should charge 2 hrs or less labor.
Funny (not funny really) story is that I pro-actively replaced my CPS on my car about a month ago. "well, it has 90,000 miles and is 11 yrs old, I should replace this part before it leaves me stranded". Now the NEW CPS is causing problems. Grrrrr. I should have just left it alone!
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Thread Starter
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Joined: May 2011
Posts: 556
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From: UK
S55K AMG
I think I did!
After a few more months of this random starting issue it then starting misfiring from time to time as well. Seemed like one of the coil packs was giving up and that could also be the issue with the no start (I kept telling myself).
In the end the misfire turned out to be the Ignitor Unit for the coilpacks that sits in the middle of the engine. After replacing that I neither got any misfire issues or any non-starting issues. So im pretty sure it was that unit which was in the early stages of failure.
Changed it about 2 years ago for a brand new unit from the dealers and the cars been fine ever since.
After a few more months of this random starting issue it then starting misfiring from time to time as well. Seemed like one of the coil packs was giving up and that could also be the issue with the no start (I kept telling myself).
In the end the misfire turned out to be the Ignitor Unit for the coilpacks that sits in the middle of the engine. After replacing that I neither got any misfire issues or any non-starting issues. So im pretty sure it was that unit which was in the early stages of failure.
Changed it about 2 years ago for a brand new unit from the dealers and the cars been fine ever since.
Thread Starter
Super Member
Joined: May 2011
Posts: 556
Likes: 10
From: UK
S55K AMG
Just when I thought it was all going great its all gone back downhill again with the starting problem. I've started a new thread below, so if anyone can offer ANY help it would be very much appreciated.
https://mbworld.org/forums/s-class-w...ml#post8120759
https://mbworld.org/forums/s-class-w...ml#post8120759
