Hi everyone. 

               I'm hoping someone on here will be able to help me with a problem I have on my 2012 superb 1.6tdi.   

   Recently the EGR valve  came up as faulty (the flashing glow plug light--limp mode etc)   my garage did a diagnostic and told me it was the EGR valve and so I have bought a new one and had it fitted today. However  I am still getting fault code p0408    and   from all the research I have found that this will be due to the ECU  not having adapted to the new EGR valve.          I have searched the forum and not found anything  that helps,  so my question is,  does anyone here know how to make the ECU adapt  the the new egr?   is there a way that can avoid  sophisticated  diagnostics?    I have on hand a simple obdii  sensor  but its strictly limited in what it can do.

      Many thanks in advance for any help or advice.

                    

2 hours ago, Mitchthecabbie said:

Hi everyone. 

               I'm hoping someone on here will be able to help me with a problem I have on my 2012 superb 1.6tdi.   

   Recently the EGR valve  came up as faulty (the flashing glow plug light--limp mode etc)   my garage did a diagnostic and told me it was the EGR valve and so I have bought a new one and had it fitted today. However  I am still getting fault code p0408    and   from all the research I have found that this will be due to the ECU  not having adapted to the new EGR valve.          I have searched the forum and not found anything  that helps,  so my question is,  does anyone here know how to make the ECU adapt  the the new egr?   is there a way that can avoid  sophisticated  diagnostics?    I have on hand a simple obdii  sensor  but its strictly limited in what it can do.

      Many thanks in advance for any help or advice.

                    

I can't find any reference to coding or pairing for this but I don't have the service manual for the 1.6 either. In general, any coding or pairing process requires VCDS, VCP, or ODIS diagnostic tools. You might find someone near you in this thread:

 

Thank you chimeara,. I will check them out! :-)

Do you know if it was a genuine or aftermarket EGR that was fitted? I only ask as I'm sure some people have reported issues with aftermarket versions.

 

Rosstech suggest this to adapt the EGR although it may not be applicable to your engine: http://wiki.ross-tech.com/wiki/index.php/Exhaust_Gas_Recirculation_(EGR)_Valve_Adaptation

Hi langer,     it was an aftermarket  product.     Ive got mine booked in with my usual auto sparky  for tomorrow.  Speaking with him today I found out that he  has sorted this issue before on other superbs so fingers crossed mine should be ok as of tomorrow.           With regards to aftermarket parts.  Normally  whenever possible I buy genuine parts  but   my car  is  a taxi and has now done over 206 000  miles  so its getting on a bit.   I expect to retire it at around 300 000   which with my usual usage will be early next year and  I couldn't stomach spending £800  on having a genuine one bought and fitted.  (£800 was the quote my usual mechanic gave me, which is more than double what I spent on buying and having  my aftermarket one bought and fitted--so even if it only lasts 50 000 miles and I have to repeat the process  I come out ahead.)       
       next on my list... Getting the DPF cleaned.      (expensive month)

Also found this from Ross-Tech :-

http://wiki.ross-tech.com/wiki/index.php/16792/P0408/001032

 

The fault code suggests an incorrect signal from the EGR potentiometer or a wiring fault.

 

As it's a new EGR it points to a wiring fault.

 

The plug to the EGR would obviously have been disturbed during the change, so possibly a wire has been broken or the plug hasn't been pushed back onto the EGR fully.

 

Worth a check.

12 minutes ago, Mitchthecabbie said:

Hi langer,     it was an aftermarket  product.     Ive got mine booked in with my usual auto sparky  for tomorrow.  Speaking with him today I found out that he  has sorted this issue before on other superbs so fingers crossed mine should be ok as of tomorrow.           With regards to aftermarket parts.  Normally  whenever possible I buy genuine parts  but   my car  is  a taxi and has now done over 206 000  miles  so its getting on a bit.   I expect to retire it at around 300 000   which with my usual usage will be early next year and  I couldn't stomach spending £800  on having a genuine one bought and fitted.  (£800 was the quote my usual mechanic gave me, which is more than double what I spent on buying and having  my aftermarket one bought and fitted--so even if it only lasts 50 000 miles and I have to repeat the process  I come out ahead.)       
       next on my list... Getting the DPF cleaned.      (expensive month)

Most of the cost of EGR replacement is labour: it requires about 5-6 hours to do the job. If you were planning to have the DPF cleaned, it would have been a good idea to have had it done at the same time as replacing the EGR involves removing the DPF for access.

3 hours ago, PipH said:

Also found this from Ross-Tech :-

http://wiki.ross-tech.com/wiki/index.php/16792/P0408/001032

 

The fault code suggests an incorrect signal from the EGR potentiometer or a wiring fault.

 

As it's a new EGR it points to a wiring fault.

 

The plug to the EGR would obviously have been disturbed during the change, so possibly a wire has been broken or the plug hasn't been pushed back onto the EGR fully.

 

Worth a check.

I am  very lucky,  the guy who I use for my auto electrics  is  very good, I am certain that he will  check that if he cant programme it in.    (if its   a  wonky wire--simple fix!)
 

 

2 hours ago, chimaera said:

Most of the cost of EGR replacement is labour: it requires about 5-6 hours to do the job. If you were planning to have the DPF cleaned, it would have been a good idea to have had it done at the same time as replacing the EGR involves removing the DPF for access.

 I know,  it was a case of  what do I have the money to pay for today?      I opted for EGR first  and  then have the DPF  cleaned as soon as I can afford it.  (this January has been  horrendously expensive--our boiler at home went down  as well as the cab)  

I  know that I have left this thread hanging for a while, so here I am to wind it up,,    The mystery of the non-pairing EGR valve has been solved!     my sparky spent two hours trying every type of communication device he could lay hands on to try and pair it before admitting defeat.   when i came to collect the car he waxed lyrical about his efforts,  he looked a broken man.    as for me, clutching at straws I asked if he had checked the plug.     He gave me a somewhat startled look, popped the bonnet and found the connector..   one good squeeze and it made a loud click and hey presto my egr was working!!! 
                 A big thankyou to everyone who contributed on this thread. 

Hi which connector was it? Getting same code! Any help be appreciated