Iffy Hussain

Hope you got the issue sorted. I was driving up to birmingham this afternoon and it seems like the issue has come back again. I had the cruise control on at 70 and i came up to a slight hill which required the car needing bit more power so it automatically accelerates but instead of keeping the speed steady it seems like its popped out of gear and just red lined.This happened twice it felt like it wanted to go into gear but couldnt so i took cruise control off and it was ok after that. The message i have on the dash is the exact same "Gearbox Malfunction you can continue driving" I will have it connected to the computer and see if its still the same error. What i think has happened is the Mechanic has changed the control valve unit and cleaned out the plug, I have a feeling there may have been still some coolant in the cable which has traveled up to the ecu connector/plug again. I am hoping i can get back to london without any issues otherwise its going to be a call to RAC on my way back. I will keep you updated when i have got it checked by a mechanic again.

Hi Sohail So I picked up my car the issue is fixed (hopefully it doesn't come back for a while). So the mechanic said this control valve is location on the dude if the gearbox at the front. It should look something like the below pictures This is where the fluid was leaking from This is the part number for my car (audi a6 c7 2011)

Hi sohail I am about to go pick it up now I will update you shortly. Cheers

Hi Sohail I have literally driven my car to my friends garage with the same issue I had the connector cleaned out it worked for about week or two then tonight decide to give me issues again. My mechanic is going to replace the coolant control valve unit. The part number he gave me is 4h0121671d coolant valve. But if you can wait tomorrow he will have my car done and I can confirm if this is the exact part. Not sure if its going to be a different part number to your car because mine is the audi a6 3.0Tdi 8 speed multitronic.

Hi I am new to the forum even though my account is registered since sept 2018, Think I may have the same issue. I have a 2011 Audi A6 C7 3.0 TDI. I was Driving into work this morning and went to overtake slipping it into Sport and a few seconds later got "Gearbox Malfunction - You can continue driving" it would not let me change into any other drive mode but the power seemed ok in "D". I took it to my friend who is a mechanic in wokingham and he put on the computer and found some codes (which i will post once i can ask him) The code that he found i asked him to search online and came across this forum. He wasnt able to put it on the ramp straight away. Tomorrow he is going to take a proper look and get back to me. I will update this forum to confirm if this was the issue. Many Thanks for all the posts seems like a common issue. My Father had the exact same model Audi A6 (which is still running) he sold it at 335k on the clock with no issues at all. Its nearly got 400k now :D.