ray_huge

Check engine light came on. So I scanned via Star and got the following code:
P0191 Fuel pressure control:the upper limit value is reached*

Anyone ever have this code? or have any clue as to what it might be?

This is for my Ml63 but that forum is fairly slow so I thought I'd try you guys...


Ray

ray_huge

Anyone seen this before??

joemomma

Currently dealing with it myself, been discussing it in another thread

Vette Guy

Any resolution to CEL code P0191? I'm not sure where to begin - any assistance is much appreciated.

Thanks!
Mark

Mr. Lin

so my 08 C63 has had this problem for awhile now. took it in and the indy shop says it's P0191 and 3699 - Upper limit has been reached or whatever. They say according to their tech site, all of the repairs for this code on this motor have been to replace the fuel pumps. changing the fuel pressure sensor on the fuel rail does nothing.

qjumpr

https://mbworld.org/forums/clk63-bla...p-failure.html

Here is a thread that was on the BS page. It shows the pic of my old and new filter. The fuel just clogs the hoses and upsets the pressure. If your car is 5/6 years old, its due for a filter change anyway and its a lot cheaper than pumps, although some have had to change pumps as well.

If you are being cheap and are mechanical, you can buy walboro pumps off amazon and retro fit them in. I was going to do that, but the filter solved my problem.

ml63amg_simon

Hello

I have a ml63 AMG 2007
I have THE same problem 3699 p0191.

If i drive my car THE first 15 minuten i have full power , and than THE car goes slowly.
Parking THE car for 1 a 2 hours than i have 15 minutes full power.

I have replaced:
Fullpomp
Fullfilter
Fullmodule
Full sensor

No results..

Please help me

ml63amg_simon

Is THE problem gone ??
How you did that ?

jvanbrecht

No wonder you have a problem, you can't follow instructions. It says to remove the film before use

Jokes aside, I had the same problem a few years back. Both pumps were replaced under warranty, for me that solved the problem.

ml63amg_simon

The film?
What must i remove ?
Can you help me with this problem.

qjumpr

When you start the car, is there a high pitched whine or whistling sound. If so it may need a PCV valve replaced. This can also cause the P0191 code.

https://mbworld.org/forums/w211-amg/...-m156-e63.html

ml63amg_simon

THE sound is normal for 10/15 minutes with fullpower. And then i want do a kickdown the sound is not normal, en than the full power is gone.
Parking for 2 hours than i have

Help me please

Starky_

I thought the whining sound is normal/common on cold starts with these cars? Usually goes away after a couple of seconds.

ml63amg_simon

i have replaced A New ECU and A New valve.
the same problem p0191

gelp me please 8 months stil the car in garages

BLKROKT

What exactly are you looking for someone to do? Look at all these posts. You need someone who knows what they're doing and has the proper tools to diagnose and correct the issues. It looks like there are a lot of them.

Mbm6f

Try finding a shop that has a good diagnostician so you stop throwing parts at it if they aren't solving the issue. Too many shops throw parts at issues because they aren't playing with their own money.

Also, is anyone else reading this thread like it's Borat?

Jasonoff

Couple different solutions in here --> https://mbworld.org/forums/c63-amg-w...ust-pipes.html

BLKROKT

He already crapped all over that thread too

Jasonoff

Under a different username?

BLKROKT

Oh, sorry. There are many threads all named similarly (see above). Now he can go pollute that one too.

Viktori

did someones have solution for this? have same error, but it was erased and not happen again, afaik there is engine cpu should be replaced, but maybe there is solution not so expensive?

Intor_thexx

just got done replacing the fuel rail pressure sensor the crankcase breather vent tube as well as the fuel filter and the code still comes back
The codes im getting is 3699 but not p0191

Viktori

you should ask for smoke generator on car repair stations to check if engine have vacuum leaks