Tech help Trans Code p0730!!!
Thread Starter
Almost a Member!
Joined: Nov 2008
Posts: 25
Likes: 0
From: Cincinnati, Oh
92 500e, 04 s600, 87 190e 16v, 93 300ce, 78 450sel 6.9
Tech help Trans Code p0730!!!
I am getting a P0730 Code on my OBD-II Scanner and the car acts like its in limp mode. No forward or reverse gears most of the time and sometimes if I restart it it will work shortly.... Any suggections?
Thanks!
Thanks!
Super Member
Joined: Oct 2005
Posts: 584
Likes: 3
From: Northern NJ
E90 N54 & W251
Here's from WIS:
Complaint:
Target gear is not reached, transmission in mechanical/hydraulic limp-home modeFault code:
055 I5I P0 730
Possible cause / Remedy
- Oil filter not assembled / Assemble oil filter
- Wiring harness damaged, short-circuit, chafing mark / Check wiring harness to ground.
- Shift pressure control solenoid valve (Y3/6y2) blocked (foreign matter) / Replace solenoid valve.
- Control, shift or command valve blocked (foreign matter) / Check slide valve for end position and ease of movement, free off if necessary.
- The spring in the control spool pressure regulating valve may be broken / Replace spring (part no.140 993 58 01).
Last edited by ~CL500~; Nov 17, 2008 at 12:30 AM.
Thread Starter
Almost a Member!
Joined: Nov 2008
Posts: 25
Likes: 0
From: Cincinnati, Oh
92 500e, 04 s600, 87 190e 16v, 93 300ce, 78 450sel 6.9
Just got the car it was an off lease car I am sure the battery went dead multiple times before it was changed to a new battery i see clear evidence of that, could that have anyting to do with it? I have not checked the wiring to the trans or the o ring. I was planning on doing the trans service tomorrow but in light of this happening I don't want to do it until I figure out the issue. Thanks!
Super Member
Joined: Oct 2005
Posts: 584
Likes: 3
From: Northern NJ
E90 N54 & W251
Just got the car it was an off lease car I am sure the battery went dead multiple times before it was changed to a new battery i see clear evidence of that, could that have anyting to do with it? I have not checked the wiring to the trans or the o ring. I was planning on doing the trans service tomorrow but in light of this happening I don't want to do it until I figure out the issue. Thanks!
That would be one of the first things I would do. When you get under there, you'll be in a better position for a diagnosis. The biggest thing is to check for evidence of leaks. Good luck
Thread Starter
Almost a Member!
Joined: Nov 2008
Posts: 25
Likes: 0
From: Cincinnati, Oh
92 500e, 04 s600, 87 190e 16v, 93 300ce, 78 450sel 6.9
Thanks appreciate it! The harness Plug adapter o ring for the harness I assume is inside the trans and should be obvious when I change the filter / fluid? Also for good measure should I just replace the shift pressure control solenoid valve? They appear to be like $23.00 From worldpac?
Thread Starter
Almost a Member!
Joined: Nov 2008
Posts: 25
Likes: 0
From: Cincinnati, Oh
92 500e, 04 s600, 87 190e 16v, 93 300ce, 78 450sel 6.9
Thank you for all the Help CL500! Unplugged the Trans harness connector and out came trans fluid!!! Ordered a new Grommet / O ring and doing a trans service now and I will let you know!!! Bingo you hit it on the head I think!!! Thanks again and I will keep you all Posted!
Super Member
Joined: Oct 2005
Posts: 584
Likes: 3
From: Northern NJ
E90 N54 & W251
NP man.
I was gonna say to check the plug for fluid before doing anything with the solenoid valve, but it looks like you may have found the problem already. Make sure you clean the electronic connector well. Here's a good reference for you with pictures courtesy of mleskovar and sunman. It's on a C-Class, but it's a 722.6 trans.
http://www.installuniversity.com/mb/...ans_oring.html
Let us know how it goes.
Trending Topics
Thread Starter
Almost a Member!
Joined: Nov 2008
Posts: 25
Likes: 0
From: Cincinnati, Oh
92 500e, 04 s600, 87 190e 16v, 93 300ce, 78 450sel 6.9
Thanks for the info! Imissed the 7 mm captive socket bolt and broke the electronics board which I replaced today, Oh well, anyway now since I installed a new electronics board I must have it re recognized by the ecu which means a trip to the stealer... But hopefully all will be well. Thanks again and I will let you know the outcome!
MB World Stories
The Best of Mercedes & AMG
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
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke
Verdad Gallardo
8 Mercedes Models With Poor Reliability Records
Verdad Gallardo
Super Member
Joined: Oct 2005
Posts: 584
Likes: 3
From: Northern NJ
E90 N54 & W251
Thanks for the info! Imissed the 7 mm captive socket bolt and broke the electronics board which I replaced today, Oh well, anyway now since I installed a new electronics board I must have it re recognized by the ecu which means a trip to the stealer... But hopefully all will be well. Thanks again and I will let you know the outcome!
Thread Starter
Almost a Member!
Joined: Nov 2008
Posts: 25
Likes: 0
From: Cincinnati, Oh
92 500e, 04 s600, 87 190e 16v, 93 300ce, 78 450sel 6.9
Well still issues doesn't appear the electronics board needed coded, Trans pressure seems ok, but stuck in basically neutral now. After new electronics kit and harness orings, basically I went from ocasionally having trans to nothing other than park and neutral... Any ideas? Thanks!
Super Member
Joined: Oct 2005
Posts: 584
Likes: 3
From: Northern NJ
E90 N54 & W251
Well still issues doesn't appear the electronics board needed coded, Trans pressure seems ok, but stuck in basically neutral now. After new electronics kit and harness orings, basically I went from ocasionally having trans to nothing other than park and neutral... Any ideas? Thanks!
At this point, I would get the car hooked up to Star Diagnostics and verify codes in the tranny. It would be worth the $$ as you did all you can do. The code you received is only OBD, not the hidden Benz codes.
My first post above lists some possibilities. Now you have to pin point exactly where the problem is. Get it hooked up to star and hang in there. Good luck!
Last edited by ~CL500~; Nov 21, 2008 at 05:17 PM.
Thread Starter
Almost a Member!
Joined: Nov 2008
Posts: 25
Likes: 0
From: Cincinnati, Oh
92 500e, 04 s600, 87 190e 16v, 93 300ce, 78 450sel 6.9
I replaced the whole valve body. Based on star diagnostics pressure solenoids not responding... Trans worked great for 50 miles and went out 2 miles from my house luckily not further on the way down to Florida where I am now. I am having a flat bed pick it up and tow it to the dealer. I am guessing either it went out again which would be weird but possible or there is another issue making it act identically...
Newbie
Joined: Dec 2015
Posts: 3
Likes: 0
MB E320, BMW 525, Ford Ranger, Harley Softtail Deluxe
Similar problem.......
On my 1998 E320, I had a retired MB mechanic replace my conductor plate, filter, and electrical connector with the o-rings after cleaning my shifter module didn't get it out of limp mode. Now, the "incorrect gear ratio" code is popping up. Any ideas from the MB buffs/experts here?
On my 1998 E320, I had a retired MB mechanic replace my conductor plate, filter, and electrical connector with the o-rings after cleaning my shifter module didn't get it out of limp mode. Now, the "incorrect gear ratio" code is popping up. Any ideas from the MB buffs/experts here?
Newbie
Joined: Apr 2016
Posts: 3
Likes: 2
From: Denver, CO
2007 S550 4matic
Thanks! Bummed...
MBWorld Fanatic!
Joined: Jan 2008
Posts: 6,149
Likes: 533
Mercedes
the most common issue is there's an electrical connector that leaks and let's fluid up into the tcu causing these issues
see the first video here
https://mbworld.org/forums/s-class-w220/608957-w220-how-repair-videos.html
Newbie
Joined: Apr 2016
Posts: 3
Likes: 2
From: Denver, CO
2007 S550 4matic
I have a "new to me" 2007 S550 4matic that is showing the same code (according to an auto parts store) and is slipping intermittently (step on gas... vroom, no go, then slow go... other times, go go go). Anyone else fix this? It is also showing a P0717 Turbine/Input Shaft Speed Sensor Circuit No Signal code.
Thanks! Bummed...
Thanks! Bummed...
MBWorld Fanatic!
Joined: Jan 2008
Posts: 6,149
Likes: 533
Mercedes
Newbie
Joined: Mar 2018
Posts: 4
Likes: 1
From: Atlanta, GA
2004 E320 & 2013 E350 4matic
P0705, 0715 & 0730 codes
Had these codes on 2004 E320 had the Star verify and recommended replacing Conductor plate and filter. While they had it out I went ahead and replaced the solenoids. After all parts replaced car runs fine with new fluid. The conductor plate came with the plugs everything done for under $500 parts and labor.
Newbie
Joined: Mar 2018
Posts: 2
Likes: 0
1997 e320
Help
Had these codes on 2004 E320 had the Star verify and recommended replacing Conductor plate and filter. While they had it out I went ahead and replaced the solenoids. After all parts replaced car runs fine with new fluid. The conductor plate came with the plugs everything done for under $500 parts and labor.
MBWorld Fanatic!
Joined: Jan 2008
Posts: 6,149
Likes: 533
Mercedes
did you completely clean the wiring and tcm , they are probably filed with fluid !
Newbie
Joined: Mar 2018
Posts: 4
Likes: 1
From: Atlanta, GA
2004 E320 & 2013 E350 4matic
My parts came from Ebay so not everything was OEM but compatible. The solenoids were remanufactured OEM. I went ahead and replaced the solenoids since they are ob the conductor plate. What codes were are you getting? I'm not sure if I can post the link but will try. Prior to replacing these parts, I had replaced the shifter as it will throw codes as well. I am a DYI as long as it not under the car (safety first) so did a lot of the work myself.
Transmission Conductor Plate+Connector+Filter+Gasket KIT FOR Mercedes Benz 722.6
6pcs OEM 722.6 Solenoids Set for Mercedes Benz 5-SPEED Automatic Transmission
Transmission Conductor Plate+Connector+Filter+Gasket KIT FOR Mercedes Benz 722.6
6pcs OEM 722.6 Solenoids Set for Mercedes Benz 5-SPEED Automatic Transmission
