M-Class (W163) Produced 1998-2005: ML 230, ML 320, ML 350, ML 400 CDI, ML 430, ML 500, ML 270 CDI

PO702 Code

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Jun 29, 2020 | 07:24 PM
  #1  
Ceasaragustus21's Avatar
Thread Starter
Newbie
 
Joined: Jun 2020
Posts: 2
Likes: 0
2001 Ml430
PO702 Code

I had a code come up PO705 and I could not get my 2001 Ml430 out of 2nd gear. I changed out the transmission computer (I have a 2000 ML430 fpr parts) and I cleared the code and it did not come back. However, I now have a PO702 code and I still cannot get out of 2nd gear. I have had no problems up until today, I did have the AC cranked for a long time today, while driving. Could it be the battery?
Thanks
Reply
Old Jun 30, 2020 | 11:55 AM
  #2  
Maj. Dundee's Avatar
MBWorld Fanatic!
 
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
These ECM codes are only an alert that you have a Trans. problem and the you must check for codes in the Trans. module.

Did you read the codes in the Trans. Module?

How did you determine that the module should be replaced?
Reply
Old Jun 30, 2020 | 12:06 PM
  #3  
Ceasaragustus21's Avatar
Thread Starter
Newbie
 
Joined: Jun 2020
Posts: 2
Likes: 0
2001 Ml430
Originally Posted by Maj. Dundee
These ECM codes are only an alert that you have a Trans. problem and the you must check for codes in the Trans. module.

Did you read the codes in the Trans. Module?

How did you determine that the module should be replaced?
Hello,
I have a OBD11 scanner, I decided to change out the trans module because it was an easy thing to do.
I see that I do not have any indication of what gear I am in on my dash. I do not see any leaking from the eletrical connection on the transmission, but may investigate that tomorrow and get my battery tested also. Thanks for your assistance
Reply
Old Jul 1, 2020 | 10:58 PM
  #4  
IgorE350's Avatar
Super Member
 
Joined: Sep 2015
Posts: 639
Likes: 36
From: Cleveland OHIO
01 ML55AMG 04 ML500 03 ML350 08 ML63AMG
Originally Posted by Ceasaragustus21
I had a code come up PO705 and I could not get my 2001 Ml430 out of 2nd gear. I changed out the transmission computer (I have a 2000 ML430 fpr parts) and I cleared the code and it did not come back. However, I now have a PO702 code and I still cannot get out of 2nd gear. I have had no problems up until today, I did have the AC cranked for a long time today, while driving. Could it be the battery?
Thanks
I had the same thing on my ML350 had to replace conductor plate inside the transmission.
Reply
Old Jul 2, 2020 | 11:02 AM
  #5  
Maj. Dundee's Avatar
MBWorld Fanatic!
 
Joined: Oct 2011
Posts: 7,107
Likes: 765
From: Bronx, N.Y.
2002 ML 320 & 2006 ML500
Originally Posted by Ceasaragustus21
Hello,
I have a OBD11 scanner, I decided to change out the trans module because it was an easy thing to do.
I see that I do not have any indication of what gear I am in on my dash. I do not see any leaking from the eletrical connection on the transmission, but may investigate that tomorrow and get my battery tested also. Thanks for your assistance
Did you read the codes in the Trans Module? Without those codes I cannot help you.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 03:42 PM.

story-0
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-1
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-2
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-3
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-4
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-5
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-6
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-7
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-8
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE
story-9
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke

Slideshow: The 2027 update adds a fully digital steering system, revised styling, and potential charging upgrades as the company looks to revive interest in the luxury EV.

By Verdad Gallardo | 2026-04-04 10:24:38


VIEW MORE