p0748 stuck in limp mode
Thread Starter
Newbie
Joined: Jul 2012
Posts: 1
Likes: 0
From: ne philadelphia
99 ml430
p0748 stuck in limp mode
okay so i was driving home from the store and i notice i the cel was on and then i notice that the car wasn't shifting at all so i read the code and it came up with p0748. now i just bought this suv a couple of months ago i haven't had the best start with it seeing as i already had aam unit and the me installed programed.has anyone had this code for the Pressure Control Solenoid Electrical any info would help thanks.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
This is a transmission code and refers to problems with two valves in the conductor plate. Both valves are wired through what is called the 13 pin connector which is on the right side (passenger) of the transmission.
Remove the small heat shield that covers it. Slide the bayonet clip open and separate the two halves. If there is fluid between the two then the connector must be replaced. Refer to the link below for a photo and part number. Do not buy this part on-line as the o-rings are not the same size as required. Only buy from the dealer, less than $20.
https://mbworld.org/forums/5073189-post30.html
Then after the repair has been made you must find a mechanic who has a professional grade scanner and he must:
1. Remove the P0748 code from the Eng. Control Module.
2. Then remove any and all three digit codes in the Trans. Control Module.
If this is not done you will continue with receiving codes and driveability problem will result.
Remember both the ECM and TCM codes must be cleared separately.
Remove the small heat shield that covers it. Slide the bayonet clip open and separate the two halves. If there is fluid between the two then the connector must be replaced. Refer to the link below for a photo and part number. Do not buy this part on-line as the o-rings are not the same size as required. Only buy from the dealer, less than $20.
https://mbworld.org/forums/5073189-post30.html
Then after the repair has been made you must find a mechanic who has a professional grade scanner and he must:
1. Remove the P0748 code from the Eng. Control Module.
2. Then remove any and all three digit codes in the Trans. Control Module.
If this is not done you will continue with receiving codes and driveability problem will result.
Remember both the ECM and TCM codes must be cleared separately.
Junior Member
Joined: Nov 2016
Posts: 60
Likes: 4
2011 E350
Does anybody know if the issue was corrected by the OP? I have this same issue p0748on a 2010 e350 722.9 tranny.
Checked K1 solenoid and all the others and they are fine resistance 5.2ohms. They click with 12v applied. Not much else to check. Flushed system. Cannot get rid of code p0748. Thanks in advance if anyone responds.
Checked K1 solenoid and all the others and they are fine resistance 5.2ohms. They click with 12v applied. Not much else to check. Flushed system. Cannot get rid of code p0748. Thanks in advance if anyone responds.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Does anybody know if the issue was corrected by the OP? I have this same issue p0748on a 2010 e350 722.9 tranny.
Checked K1 solenoid and all the others and they are fine resistance 5.2ohms. They click with 12v applied. Not much else to check. Flushed system. Cannot get rid of code p0748. Thanks in advance if anyone responds.
Checked K1 solenoid and all the others and they are fine resistance 5.2ohms. They click with 12v applied. Not much else to check. Flushed system. Cannot get rid of code p0748. Thanks in advance if anyone responds.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
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Newbie
Joined: Sep 2021
Posts: 4
Likes: 0
E320cdi
Does anybody know if the issue was corrected by the OP? I have this same issue p0748on a 2010 e350 722.9 tranny.
Checked K1 solenoid and all the others and they are fine resistance 5.2ohms. They click with 12v applied. Not much else to check. Flushed system. Cannot get rid of code p0748. Thanks in advance if anyone responds.
Checked K1 solenoid and all the others and they are fine resistance 5.2ohms. They click with 12v applied. Not much else to check. Flushed system. Cannot get rid of code p0748. Thanks in advance if anyone responds.
Junior Member
Joined: Nov 2016
Posts: 60
Likes: 4
2011 E350
The issue can only be solved by changing the plate. In my case I changed the valve body and plate together. Also the bolts are aluminum and need changing. Bought a used 2018 model on EBay that matched the one I replaced. Then you have to get it programmed to your car and adapted.
Once you do that it will take care of your problem guaranteed.
I already did all the tests to k1, complete flush, solenoids cleaning etc. Nothing worked. Plate and valve body 400 plus programming 250. Plus bolts and gasket with filter kit.Got off easy doing the swap myself.
Once you do that it will take care of your problem guaranteed.
I already did all the tests to k1, complete flush, solenoids cleaning etc. Nothing worked. Plate and valve body 400 plus programming 250. Plus bolts and gasket with filter kit.Got off easy doing the swap myself.
Last edited by gica69; Dec 28, 2021 at 05:36 PM.
Newbie
Joined: Sep 2021
Posts: 4
Likes: 0
E320cdi
The issue can only be solved by changing the plate. In my case I changed the valve body and plate together. Also the bolts are aluminum and need changing. Bought a used 2018 model on EBay that matched the one I replaced. Then you have to get it programmed to your car and adapted.
Once you do that it will take care of your problem guaranteed.
I already did all the tests to k1, complete flush, solenoids cleaning etc. Nothing worked. Plate and valve body 400 plus programming 250. Plus bolts and gasket with filter kit.Got off easy doing the swap myself.
Once you do that it will take care of your problem guaranteed.
I already did all the tests to k1, complete flush, solenoids cleaning etc. Nothing worked. Plate and valve body 400 plus programming 250. Plus bolts and gasket with filter kit.Got off easy doing the swap myself.
Thanks man... It was what i thought... After many reading. Thanks a lot i am now Looking for a vgs2 lije mine and i Will do it. Thanks
Newbie
Joined: Mar 2022
Posts: 1
Likes: 0
2010 e350
Transmissions issue benz
The issue can only be solved by changing the plate. In my case I changed the valve body and plate together. Also the bolts are aluminum and need changing. Bought a used 2018 model on EBay that matched the one I replaced. Then you have to get it programmed to your car and adapted.
Once you do that it will take care of your problem guaranteed.
I already did all the tests to k1, complete flush, solenoids cleaning etc. Nothing worked. Plate and valve body 400 plus programming 250. Plus bolts and gasket with filter kit.Got off easy doing the swap myself.
Once you do that it will take care of your problem guaranteed.
I already did all the tests to k1, complete flush, solenoids cleaning etc. Nothing worked. Plate and valve body 400 plus programming 250. Plus bolts and gasket with filter kit.Got off easy doing the swap myself.
MBWorld Fanatic!
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Junior Member
Joined: Dec 2019
Posts: 48
Likes: 12
2010 mercedes e550
your MB-Xentry, has very details in explanations..
Here is icarsofts explanation of the p0430 code.. (lookup catalyst system efficiency below thereshold bank 2 (nothing more)..
I totally get these are two different machines with each having there own different algorithms. obviously controlled by two different price points..
I just tried to revert back to the original version software(the update does not have any other versions), also did hard reset on the unit and still the same, so i can safely assume its probably the version that it
came with. I looked up icarsoft site for software versions, but came up empty..
When code first came up, i started to check for emissions leaks, when i remove the air intake inside the airfilter and i found about 10" piece of bicycle tubing. that i must have left behind and it got suck into the airtake tube. The car actually runs fine, no drop in fuel consumption, idles fine, no misfire, car still gets up and move when pedal to the metal.. So i would like to at least erase the cel code to do a drive cycle, but thats where im stuck..
Here is icarsofts explanation of the p0430 code.. (lookup catalyst system efficiency below thereshold bank 2 (nothing more)..
I totally get these are two different machines with each having there own different algorithms. obviously controlled by two different price points..
I just tried to revert back to the original version software(the update does not have any other versions), also did hard reset on the unit and still the same, so i can safely assume its probably the version that it
came with. I looked up icarsoft site for software versions, but came up empty..
When code first came up, i started to check for emissions leaks, when i remove the air intake inside the airfilter and i found about 10" piece of bicycle tubing. that i must have left behind and it got suck into the airtake tube. The car actually runs fine, no drop in fuel consumption, idles fine, no misfire, car still gets up and move when pedal to the metal.. So i would like to at least erase the cel code to do a drive cycle, but thats where im stuck..
